90128680 has 32 divisors (see below), whose sum is σ = 203148000. Its totient is φ = 35987776.

The previous prime is 90128677. The next prime is 90128681. The reversal of 90128680 is 8682109.

It is not an unprimeable number, because it can be changed into a prime (90128681) 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, 25671 + ... + 28969.

It is an arithmetic number, because the mean of its divisors is an integer number (6348375).

Almost surely, 2^90128680 is an apocalyptic number.

It is an amenable number.

90128680 is an abundant number, since it is smaller than the sum of its proper divisors (113019320).

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

90128680 is a wasteful number, since it uses less digits than its factorization.

90128680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3993 (or 3989 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 90128680 is about 9493.6125895257. The cubic root of 90128680 is about 448.3539533763.

The spelling of 90128680 in words is "ninety million, one hundred twenty-eight thousand, six hundred eighty".