78857472 has 36 divisors (see below), whose sum is σ = 209877920. Its totient is φ = 26285568.

The previous prime is 78857461. The next prime is 78857507. The reversal of 78857472 is 27475887.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 50572 + ... + 52107.

Almost surely, 2^78857472 is an apocalyptic number.

It is an amenable number.

78857472 is an abundant number, since it is smaller than the sum of its proper divisors (131020448).

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

78857472 is a wasteful number, since it uses less digits than its factorization.

78857472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102698 (or 102684 counting only the distinct ones).

The product of its digits is 878080, while the sum is 48.

The square root of 78857472 is about 8880.1729712883. The cubic root of 78857472 is about 428.8258430998.

The spelling of 78857472 in words is "seventy-eight million, eight hundred fifty-seven thousand, four hundred seventy-two".