87686780 has 24 divisors (see below), whose sum is σ = 185213952. Its totient is φ = 34870592.

The previous prime is 87686779. The next prime is 87686791. The reversal of 87686780 is 8768678.

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 7 ways as a sum of consecutive naturals, for example, 9212 + ... + 16131.

It is an arithmetic number, because the mean of its divisors is an integer number (7717248).

Almost surely, 2^87686780 is an apocalyptic number.

It is an amenable number.

87686780 is an abundant number, since it is smaller than the sum of its proper divisors (97527172).

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

87686780 is a wasteful number, since it uses less digits than its factorization.

87686780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25525 (or 25523 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 50.

The square root of 87686780 is about 9364.1219556347. The cubic root of 87686780 is about 444.2676672427.

The spelling of 87686780 in words is "eighty-seven million, six hundred eighty-six thousand, seven hundred eighty".