87980660 has 24 divisors (see below), whose sum is σ = 185582880. Its totient is φ = 35035424.

The previous prime is 87980657. The next prime is 87980671. The reversal of 87980660 is 6608978.

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, 5150 + ... + 14229.

It is an arithmetic number, because the mean of its divisors is an integer number (7732620).

Almost surely, 2^87980660 is an apocalyptic number.

It is an amenable number.

87980660 is an abundant number, since it is smaller than the sum of its proper divisors (97602220).

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

87980660 is a wasteful number, since it uses less digits than its factorization.

87980660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19615 (or 19613 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 87980660 is about 9379.8006375402. The cubic root of 87980660 is about 444.7634310485.

The spelling of 87980660 in words is "eighty-seven million, nine hundred eighty thousand, six hundred sixty".