78548864 has 32 divisors (see below), whose sum is σ = 163293840. Its totient is φ = 37565440.

The previous prime is 78548863. The next prime is 78548867. The reversal of 78548864 is 46884587.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78548861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10397 + ... + 16284.

Almost surely, 2^78548864 is an apocalyptic number.

It is an amenable number.

78548864 is an abundant number, since it is smaller than the sum of its proper divisors (84744976).

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

78548864 is a wasteful number, since it uses less digits than its factorization.

78548864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26718 (or 26706 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 50.

The square root of 78548864 is about 8862.7796993945. The cubic root of 78548864 is about 428.2657097576.

The spelling of 78548864 in words is "seventy-eight million, five hundred forty-eight thousand, eight hundred sixty-four".