358

358 is a natural number that follows 357 and precedes 359. In mathematics, it is an even composite number with prime factorization 2 × 179, where 179 is prime. Its divisors are 1, 2, 179, and 358. The sum of its digits is 16, so it is not divisible by 3 or 9. The Euler totient of 358 is φ(358) = 178. In base representations, 358 equals 101100110 in binary and 0x166 in hexadecimal. Because 179 is a prime congruent to 3 modulo 4, 358 cannot be expressed as the sum of two squares.

In other uses, 358 appears in international dialing as the country calling code for Finland, written with a leading plus as +358. In Roman numerals, 358 is written as CCCLVIII. The number thus has occasional appearance in lists, catalogs, and labeling across various domains, but its significance is typically mathematical or administrative rather than culturally distinctive.

Overall, 358 is a small, well-defined integer notable for its factorization into two primes, its divisors, and its representations in different bases. Its properties place it among the even semiprimes, and it has typical arithmetic characteristics useful in number theory discussions and basic numeracy.

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