78512572 has 12 divisors (see below), whose sum is σ = 137840976. Its totient is φ = 39129440.

The previous prime is 78512563. The next prime is 78512597. The reversal of 78512572 is 27521587.

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, 30313 + ... + 32800.

It is an arithmetic number, because the mean of its divisors is an integer number (11486748).

Almost surely, 2^78512572 is an apocalyptic number.

It is an amenable number.

78512572 is a deficient number, since it is larger than the sum of its proper divisors (59328404).

78512572 is a wasteful number, since it uses less digits than its factorization.

78512572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63428 (or 63426 counting only the distinct ones).

The product of its digits is 39200, while the sum is 37.

The square root of 78512572 is about 8860.7320239357. The cubic root of 78512572 is about 428.1997422706.

The spelling of 78512572 in words is "seventy-eight million, five hundred twelve thousand, five hundred seventy-two".