74140728 has 32 divisors (see below), whose sum is σ = 187090560. Its totient is φ = 24481760.

The previous prime is 74140727. The next prime is 74140783. The reversal of 74140728 is 82704147.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74140727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11868 + ... + 17003.

It is an arithmetic number, because the mean of its divisors is an integer number (5846580).

Almost surely, 2^74140728 is an apocalyptic number.

It is an amenable number.

74140728 is an abundant number, since it is smaller than the sum of its proper divisors (112949832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74140728 is a wasteful number, since it uses less digits than its factorization.

74140728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28987 (or 28983 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 74140728 is about 8610.5010307182. The cubic root of 74140728 is about 420.0996135605.

The spelling of 74140728 in words is "seventy-four million, one hundred forty thousand, seven hundred twenty-eight".