78856704 has 120 divisors (see below), whose sum is σ = 231136620. Its totient is φ = 25878528.

The previous prime is 78856691. The next prime is 78856709. The reversal of 78856704 is 40765887.

78856704 is a `hidden beast` number, since 7 + 88 + 567 + 0 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 78854400 + 2304 = 8880^2 + 48^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78856704.

It is not an unprimeable number, because it can be changed into a prime (78856709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 502194 + ... + 502350.

Almost surely, 2^78856704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78856704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115568310).

78856704 is an abundant number, since it is smaller than the sum of its proper divisors (152279916).

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

78856704 is a wasteful number, since it uses less digits than its factorization.

78856704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 78856704 is about 8880.1297287821. The cubic root of 78856704 is about 428.8244509708.

The spelling of 78856704 in words is "seventy-eight million, eight hundred fifty-six thousand, seven hundred four".