87689904 has 20 divisors (see below), whose sum is σ = 226532376. Its totient is φ = 29229952.

The previous prime is 87689887. The next prime is 87689911. The reversal of 87689904 is 40998678.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913389 + ... + 913484.

Almost surely, 2^87689904 is an apocalyptic number.

It is an amenable number.

87689904 is an abundant number, since it is smaller than the sum of its proper divisors (138842472).

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

87689904 is a wasteful number, since it uses less digits than its factorization.

87689904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826884 (or 1826878 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 87689904 is about 9364.2887610325. The cubic root of 87689904 is about 444.2729431262.

The spelling of 87689904 in words is "eighty-seven million, six hundred eighty-nine thousand, nine hundred four".