74239028 has 24 divisors (see below), whose sum is σ = 134340360. Its totient is φ = 35873280.

The previous prime is 74239003. The next prime is 74239031. The reversal of 74239028 is 82093247.

It can be written as a sum of positive squares in 4 ways, for example, as 1170724 + 73068304 = 1082^2 + 8548^2 .

It is a super-2 number, since 2×74239028² = 11022866556769568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15800 + ... + 19952.

It is an arithmetic number, because the mean of its divisors is an integer number (5597515).

Almost surely, 2^74239028 is an apocalyptic number.

It is an amenable number.

74239028 is a deficient number, since it is larger than the sum of its proper divisors (60101332).

74239028 is a wasteful number, since it uses less digits than its factorization.

74239028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4307 (or 4305 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 74239028 is about 8616.2072862716. The cubic root of 74239028 is about 420.2851955646.

The spelling of 74239028 in words is "seventy-four million, two hundred thirty-nine thousand, twenty-eight".