90057980 has 36 divisors (see below), whose sum is σ = 191376360. Its totient is φ = 35598528.

The previous prime is 90057977. The next prime is 90057991. The reversal of 90057980 is 8975009.

It is a super-2 number, since 2×90057980² = 16220879523360800, which contains 22 as substring.

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, 237431 + ... + 237809.

It is an arithmetic number, because the mean of its divisors is an integer number (5316010).

Almost surely, 2^90057980 is an apocalyptic number.

It is an amenable number.

90057980 is an abundant number, since it is smaller than the sum of its proper divisors (101318380).

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

90057980 is a wasteful number, since it uses less digits than its factorization.

90057980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 90057980 is about 9489.8883028200. Note that the first 3 decimals coincide. The cubic root of 90057980 is about 448.2366880152.

The spelling of 90057980 in words is "ninety million, fifty-seven thousand, nine hundred eighty".