74258728 has 8 divisors (see below), whose sum is σ = 139235130. Its totient is φ = 37129360.

The previous prime is 74258711. The next prime is 74258729. The reversal of 74258728 is 82785247.

It can be written as a sum of positive squares in only one way, i.e., 38713284 + 35545444 = 6222^2 + 5962^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×74258728³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (74258729) by changing a digit.

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 as a sum of consecutive naturals, namely, 4641163 + ... + 4641178.

Almost surely, 2^74258728 is an apocalyptic number.

It is an amenable number.

74258728 is a deficient number, since it is larger than the sum of its proper divisors (64976402).

74258728 is a wasteful number, since it uses less digits than its factorization.

74258728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9282347 (or 9282343 counting only the distinct ones).

The product of its digits is 250880, while the sum is 43.

The square root of 74258728 is about 8617.3504048518. The cubic root of 74258728 is about 420.3223677741.

The spelling of 74258728 in words is "seventy-four million, two hundred fifty-eight thousand, seven hundred twenty-eight".