90707656 has 16 divisors (see below), whose sum is σ = 183159900. Its totient is φ = 41865024.

The previous prime is 90707651. The next prime is 90707657. The reversal of 90707656 is 65670709.

It can be written as a sum of positive squares in 2 ways, for example, as 89605156 + 1102500 = 9466^2 + 1050^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (90707651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435991 + ... + 436198.

Almost surely, 2^90707656 is an apocalyptic number.

It is an amenable number.

90707656 is an abundant number, since it is smaller than the sum of its proper divisors (92452244).

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

90707656 is a wasteful number, since it uses less digits than its factorization.

90707656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872208 (or 872204 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 90707656 is about 9524.0566986973. The cubic root of 90707656 is about 449.3119625378.

The spelling of 90707656 in words is "ninety million, seven hundred seven thousand, six hundred fifty-six".