74728564 has 12 divisors (see below), whose sum is σ = 136461024. Its totient is φ = 35739704.

The previous prime is 74728531. The next prime is 74728571. The reversal of 74728564 is 46582747.

74728564 is nontrivially palindromic in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 74728564.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406042 + ... + 406225.

It is an arithmetic number, because the mean of its divisors is an integer number (11371752).

Almost surely, 2^74728564 is an apocalyptic number.

It is an amenable number.

74728564 is a deficient number, since it is larger than the sum of its proper divisors (61732460).

74728564 is a wasteful number, since it uses less digits than its factorization.

74728564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812294 (or 812292 counting only the distinct ones).

The product of its digits is 376320, while the sum is 43.

The square root of 74728564 is about 8644.5684681192. The cubic root of 74728564 is about 421.2069665791.

The spelling of 74728564 in words is "seventy-four million, seven hundred twenty-eight thousand, five hundred sixty-four".