87133880 has 32 divisors (see below), whose sum is σ = 197964000. Its totient is φ = 34513536.

The previous prime is 87133877. The next prime is 87133933. The reversal of 87133880 is 8833178.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6455 + ... + 14694.

It is an arithmetic number, because the mean of its divisors is an integer number (6186375).

Almost surely, 2^87133880 is an apocalyptic number.

It is an amenable number.

87133880 is an abundant number, since it is smaller than the sum of its proper divisors (110830120).

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

87133880 is a wasteful number, since it uses less digits than its factorization.

87133880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21263 (or 21259 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 87133880 is about 9334.5530155439. The cubic root of 87133880 is about 443.3319363528.

The spelling of 87133880 in words is "eighty-seven million, one hundred thirty-three thousand, eight hundred eighty".