90000636 has 24 divisors (see below), whose sum is σ = 229092864. Its totient is φ = 27272880.

The previous prime is 90000611. The next prime is 90000653. The reversal of 90000636 is 63600009.

90000636 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×90000636² = 16200228960808992, which contains 22 as substring.

90000636 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340780 + ... + 341043.

It is an arithmetic number, because the mean of its divisors is an integer number (9545536).

Almost surely, 2^90000636 is an apocalyptic number.

It is an amenable number.

90000636 is an abundant number, since it is smaller than the sum of its proper divisors (139092228).

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

90000636 is a wasteful number, since it uses less digits than its factorization.

90000636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681841 (or 681839 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 90000636 is about 9486.8665005891. The cubic root of 90000636 is about 448.1415302730.

The spelling of 90000636 in words is "ninety million, six hundred thirty-six", and thus it is an aban number.