87990030 has 32 divisors (see below), whose sum is σ = 234640800. Its totient is φ = 23463936.

The previous prime is 87990029. The next prime is 87990041. The reversal of 87990030 is 3009978.

It is a congruent number.

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, 162675 + ... + 163214.

It is an arithmetic number, because the mean of its divisors is an integer number (7332525).

Almost surely, 2^87990030 is an apocalyptic number.

87990030 is an abundant number, since it is smaller than the sum of its proper divisors (146650770).

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

87990030 is a wasteful number, since it uses less digits than its factorization.

87990030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325905 (or 325899 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 87990030 is about 9380.3001018091. The cubic root of 87990030 is about 444.7792196904.

It can be divided in two parts, 879 and 90030, that added together give a palindrome (90909).

The spelling of 87990030 in words is "eighty-seven million, nine hundred ninety thousand, thirty".