90040656 has 40 divisors (see below), whose sum is σ = 233189440. Its totient is φ = 29938176.

The previous prime is 90040651. The next prime is 90040669. The reversal of 90040656 is 65604009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90040651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18936 + ... + 23208.

It is an arithmetic number, because the mean of its divisors is an integer number (5829736).

Almost surely, 2^90040656 is an apocalyptic number.

It is an amenable number.

90040656 is an abundant number, since it is smaller than the sum of its proper divisors (143148784).

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

90040656 is a wasteful number, since it uses less digits than its factorization.

90040656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4723 (or 4717 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 90040656 is about 9488.9754979134. The cubic root of 90040656 is about 448.2079444941.

The spelling of 90040656 in words is "ninety million, forty thousand, six hundred fifty-six".