78956670 has 64 divisors (see below), whose sum is σ = 216095040. Its totient is φ = 18290688.

The previous prime is 78956651. The next prime is 78956699. The reversal of 78956670 is 7665987.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 676 + ... + 12584.

It is an arithmetic number, because the mean of its divisors is an integer number (3376485).

Almost surely, 2^78956670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78956670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108047520).

78956670 is an abundant number, since it is smaller than the sum of its proper divisors (137138370).

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

78956670 is a wasteful number, since it uses less digits than its factorization.

78956670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11949.

The product of its (nonzero) digits is 635040, while the sum is 48.

The square root of 78956670 is about 8885.7565800555. The cubic root of 78956670 is about 429.0055802057.

The spelling of 78956670 in words is "seventy-eight million, nine hundred fifty-six thousand, six hundred seventy".