90256 has 10 divisors (see below), whose sum is σ = 174902. Its totient is φ = 45120.

The previous prime is 90247. The next prime is 90263. The reversal of 90256 is 65209.

It can be written as a sum of positive squares in only one way, i.e., 90000 + 256 = 300^2 + 16^2 .

It is a super-2 number, since 2×90256² = 16292291072, which contains 22 as substring.

It is an unprimeable number.

90256 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2805 + ... + 2836.

2⁹⁰²⁵⁶ is an apocalyptic number.

It is an amenable number.

90256 is a deficient number, since it is larger than the sum of its proper divisors (84646).

90256 is a wasteful number, since it uses less digits than its factorization.

90256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5649 (or 5643 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 90256 is about 300.4263636900. The cubic root of 90256 is about 44.8564975981.

The spelling of 90256 in words is "ninety thousand, two hundred fifty-six".