90642900 has 36 divisors (see below), whose sum is σ = 262260992. Its totient is φ = 24171360.

The previous prime is 90642887. The next prime is 90642913. The reversal of 90642900 is 924609.

It is an interprime number because it is at equal distance from previous prime (90642887) and next prime (90642913).

It is a super-2 number, since 2×90642900² = 16432270640820000, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150772 + ... + 151371.

Almost surely, 2^90642900 is an apocalyptic number.

It is an amenable number.

90642900 is an abundant number, since it is smaller than the sum of its proper divisors (171618092).

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

90642900 is a wasteful number, since it uses less digits than its factorization.

90642900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302160 (or 302153 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 90642900 is about 9520.6564899696. The cubic root of 90642900 is about 449.2050161371.

The spelling of 90642900 in words is "ninety million, six hundred forty-two thousand, nine hundred".