78965856 has 36 divisors (see below), whose sum is σ = 224559972. Its totient is φ = 26321856.

The previous prime is 78965851. The next prime is 78965879. The reversal of 78965856 is 65856987.

It is a tau number, because it is divible by the number of its divisors (36).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78965851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 136806 + ... + 137381.

It is an arithmetic number, because the mean of its divisors is an integer number (6237777).

Almost surely, 2^78965856 is an apocalyptic number.

It is an amenable number.

78965856 is an abundant number, since it is smaller than the sum of its proper divisors (145594116).

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

78965856 is a wasteful number, since it uses less digits than its factorization.

78965856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274203 (or 274192 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The square root of 78965856 is about 8886.2734596680. The cubic root of 78965856 is about 429.0222167248.

The spelling of 78965856 in words is "seventy-eight million, nine hundred sixty-five thousand, eight hundred fifty-six".