74839128 has 64 divisors (see below), whose sum is σ = 230280960. Its totient is φ = 19737216.

The previous prime is 74839103. The next prime is 74839133. The reversal of 74839128 is 82193847.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 74839128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14950 + ... + 19317.

It is an arithmetic number, because the mean of its divisors is an integer number (3598140).

Almost surely, 2^74839128 is an apocalyptic number.

74839128 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

74839128 is an abundant number, since it is smaller than the sum of its proper divisors (155441832).

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

74839128 is a wasteful number, since it uses less digits than its factorization.

74839128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34296 (or 34292 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 74839128 is about 8650.9611026752. The cubic root of 74839128 is about 421.4145952548.

The spelling of 74839128 in words is "seventy-four million, eight hundred thirty-nine thousand, one hundred twenty-eight".