87644660 has 24 divisors (see below), whose sum is σ = 187971840. Its totient is φ = 34311584.

The previous prime is 87644659. The next prime is 87644681. The reversal of 87644660 is 6644678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45680 + ... + 47559.

It is an arithmetic number, because the mean of its divisors is an integer number (7832160).

Almost surely, 2^87644660 is an apocalyptic number.

It is an amenable number.

87644660 is an abundant number, since it is smaller than the sum of its proper divisors (100327180).

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

87644660 is a wasteful number, since it uses less digits than its factorization.

87644660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93295 (or 93293 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 87644660 is about 9361.8726759127. The cubic root of 87644660 is about 444.1965217743.

The spelling of 87644660 in words is "eighty-seven million, six hundred forty-four thousand, six hundred sixty".