87999988 has 12 divisors (see below), whose sum is σ = 154195552. Its totient is φ = 43944120.

The previous prime is 87999971. The next prime is 87999997. The reversal of 87999988 is 88999978.

It is a happy number.

It is a congruent 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, 10320 + ... + 16807.

Almost surely, 2^87999988 is an apocalyptic number.

It is an amenable number.

87999988 is a deficient number, since it is larger than the sum of its proper divisors (66195564).

87999988 is a wasteful number, since it uses less digits than its factorization.

87999988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27942 (or 27940 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 67.

The square root of 87999988 is about 9380.8308800447. The cubic root of 87999988 is about 444.7959978959.

The spelling of 87999988 in words is "eighty-seven million, nine hundred ninety-nine thousand, nine hundred eighty-eight".