90431656 has 24 divisors (see below), whose sum is σ = 197243370. Its totient is φ = 38756256.

The previous prime is 90431641. The next prime is 90431717. The reversal of 90431656 is 65613409.

It can be written as a sum of positive squares in only one way, i.e., 54022500 + 36409156 = 7350^2 + 6034^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 114955 + ... + 115738.

Almost surely, 2^90431656 is an apocalyptic number.

It is an amenable number.

90431656 is an abundant number, since it is smaller than the sum of its proper divisors (106811714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90431656 is a wasteful number, since it uses less digits than its factorization.

90431656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230713 (or 230702 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 90431656 is about 9509.5560359041. The cubic root of 90431656 is about 448.8557860800.

The spelling of 90431656 in words is "ninety million, four hundred thirty-one thousand, six hundred fifty-six".