74315728 has 20 divisors (see below), whose sum is σ = 144151488. Its totient is φ = 37115360.

The previous prime is 74315723. The next prime is 74315743. The reversal of 74315728 is 82751347.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74315723) 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, 15543 + ... + 19753.

Almost surely, 2^74315728 is an apocalyptic number.

It is an amenable number.

74315728 is a deficient number, since it is larger than the sum of its proper divisors (69835760).

74315728 is a wasteful number, since it uses less digits than its factorization.

74315728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5322 (or 5316 counting only the distinct ones).

The product of its digits is 47040, while the sum is 37.

The square root of 74315728 is about 8620.6570515246. The cubic root of 74315728 is about 420.4298848664.

It can be divided in two parts, 743 and 15728, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 74315728 in words is "seventy-four million, three hundred fifteen thousand, seven hundred twenty-eight".