74705728 has 14 divisors (see below), whose sum is σ = 148244306. Its totient is φ = 37352832.

The previous prime is 74705723. The next prime is 74705767. The reversal of 74705728 is 82750747.

It can be written as a sum of positive squares in only one way, i.e., 71774784 + 2930944 = 8472^2 + 1712^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74705723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583575 + ... + 583702.

It is an arithmetic number, because the mean of its divisors is an integer number (10588879).

Almost surely, 2^74705728 is an apocalyptic number.

It is an amenable number.

74705728 is a deficient number, since it is larger than the sum of its proper divisors (73538578).

74705728 is a wasteful number, since it uses less digits than its factorization.

74705728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167289 (or 1167279 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 74705728 is about 8643.2475378182. The cubic root of 74705728 is about 421.1640572295.

The spelling of 74705728 in words is "seventy-four million, seven hundred five thousand, seven hundred twenty-eight".