90118900 has 36 divisors (see below), whose sum is σ = 205854880. Its totient is φ = 34149600.

The previous prime is 90118879. The next prime is 90118907. The reversal of 90118900 is 981109.

It is a super-2 number, since 2×90118900² = 16242832274420000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90118907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21816 + ... + 25615.

Almost surely, 2^90118900 is an apocalyptic number.

It is an amenable number.

90118900 is an abundant number, since it is smaller than the sum of its proper divisors (115735980).

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

90118900 is a wasteful number, since it uses less digits than its factorization.

90118900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47464 (or 47457 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 90118900 is about 9493.0974923889. The cubic root of 90118900 is about 448.3377356001.

The spelling of 90118900 in words is "ninety million, one hundred eighteen thousand, nine hundred".