90115072 has 22 divisors (see below), whose sum is σ = 180144188. Its totient is φ = 45057024.

The previous prime is 90115033. The next prime is 90115073. The reversal of 90115072 is 27051109.

It is not an unprimeable number, because it can be changed into a prime (90115073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42978 + ... + 45025.

Almost surely, 2^90115072 is an apocalyptic number.

It is an amenable number.

90115072 is a deficient number, since it is larger than the sum of its proper divisors (90029116).

90115072 is an equidigital number, since it uses as much as digits as its factorization.

90115072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88023 (or 88005 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 90115072 is about 9492.8958700704. The cubic root of 90115072 is about 448.3313874639.

The spelling of 90115072 in words is "ninety million, one hundred fifteen thousand, seventy-two".