78686960 has 40 divisors (see below), whose sum is σ = 199580976. Its totient is φ = 28613120.

The previous prime is 78686941. The next prime is 78686963. The reversal of 78686960 is 6968687.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 78686899 and 78686908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78686963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43829 + ... + 45588.

Almost surely, 2^78686960 is an apocalyptic number.

It is an amenable number.

78686960 is an abundant number, since it is smaller than the sum of its proper divisors (120894016).

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

78686960 is a wasteful number, since it uses less digits than its factorization.

78686960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89441 (or 89435 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 78686960 is about 8870.5670619189. The cubic root of 78686960 is about 428.5165394254.

The spelling of 78686960 in words is "seventy-eight million, six hundred eighty-six thousand, nine hundred sixty".