78505968 has 20 divisors (see below), whose sum is σ = 202807208. Its totient is φ = 26168640.

The previous prime is 78505951. The next prime is 78505993. The reversal of 78505968 is 86950587.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 1635541 = 78505968 / (7 + 8 + 5 + 0 + 5 + 9 + 6 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 817723 + ... + 817818.

Almost surely, 2^78505968 is an apocalyptic number.

It is an amenable number.

78505968 is an abundant number, since it is smaller than the sum of its proper divisors (124301240).

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

78505968 is a wasteful number, since it uses less digits than its factorization.

78505968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635552 (or 1635546 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 48.

The square root of 78505968 is about 8860.3593606580. The cubic root of 78505968 is about 428.1877360814.

The spelling of 78505968 in words is "seventy-eight million, five hundred five thousand, nine hundred sixty-eight".