87990490 has 32 divisors (see below), whose sum is σ = 181336320. Its totient is φ = 30113664.

The previous prime is 87990481. The next prime is 87990503. The reversal of 87990490 is 9409978.

It is a self number, because there is not a number n which added to its sum of digits gives 87990490.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66051 + ... + 67369.

It is an arithmetic number, because the mean of its divisors is an integer number (5666760).

Almost surely, 2^87990490 is an apocalyptic number.

87990490 is an abundant number, since it is smaller than the sum of its proper divisors (93345830).

87990490 is a wasteful number, since it uses less digits than its factorization.

87990490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 87990490 is about 9380.3246212485. The cubic root of 87990490 is about 444.7799947710.

The spelling of 87990490 in words is "eighty-seven million, nine hundred ninety thousand, four hundred ninety".