87213768 has 16 divisors (see below), whose sum is σ = 218034480. Its totient is φ = 29071248.

The previous prime is 87213751. The next prime is 87213787. The reversal of 87213768 is 86731278.

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, 1816930 + ... + 1816977.

It is an arithmetic number, because the mean of its divisors is an integer number (13627155).

Almost surely, 2^87213768 is an apocalyptic number.

It is an amenable number.

87213768 is an abundant number, since it is smaller than the sum of its proper divisors (130820712).

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

87213768 is a wasteful number, since it uses less digits than its factorization.

87213768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3633916 (or 3633912 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 87213768 is about 9338.8311902507. The cubic root of 87213768 is about 443.4673834117.

The spelling of 87213768 in words is "eighty-seven million, two hundred thirteen thousand, seven hundred sixty-eight".