• 356 can be written using four 4's:

See also 113.

---

356 has 6 divisors (see below), whose sum is σ = 630. Its totient is φ = 176.

The previous prime is 353. The next prime is 359. The reversal of 356 is 653.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (353) and next prime (359).

It can be written as a sum of positive squares in only one way, i.e., 256 + 100 = 16^2 + 10^2 .

It is a magnanimous number.

It is an Ulam number.

It is a plaindrome in base 10, base 12 and base 15.

It is a nialpdrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 356.

It is not an unprimeable number, because it can be changed into a prime (353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41 + ... + 48.

It is an arithmetic number, because the mean of its divisors is an integer number (105).

It is an amenable number.

356 is a deficient number, since it is larger than the sum of its proper divisors (274).

356 is a wasteful number, since it uses less digits than its factorization.

356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 91 counting only the distinct ones).

The product of its digits is 90, while the sum is 14.

The square root of 356 is about 18.8679622641. The cubic root of 356 is about 7.0873410615.

It can be divided in two parts, 35 and 6, that multiplied together give a triangular number (210 = T₂₀).

The spelling of 356 in words is "three hundred fifty-six", and thus it is an aban number and an oban number.