87157988 has 12 divisors (see below), whose sum is σ = 157446912. Its totient is φ = 42173160.

The previous prime is 87157979. The next prime is 87157991. The reversal of 87157988 is 88975178.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351320 + ... + 351567.

It is an arithmetic number, because the mean of its divisors is an integer number (13120576).

Almost surely, 2^87157988 is an apocalyptic number.

It is an amenable number.

87157988 is a deficient number, since it is larger than the sum of its proper divisors (70288924).

87157988 is a wasteful number, since it uses less digits than its factorization.

87157988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702922 (or 702920 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 53.

The square root of 87157988 is about 9335.8442574842. The cubic root of 87157988 is about 443.3728192668.

The spelling of 87157988 in words is "eighty-seven million, one hundred fifty-seven thousand, nine hundred eighty-eight".