74720900 has 36 divisors (see below), whose sum is σ = 162684900. Its totient is φ = 29788800.

The previous prime is 74720843. The next prime is 74720903. The reversal of 74720900 is 902747.

It can be written as a sum of positive squares in 6 ways, for example, as 5098564 + 69622336 = 2258^2 + 8344^2 .

It is not an unprimeable number, because it can be changed into a prime (74720903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33830 + ... + 35970.

It is an arithmetic number, because the mean of its divisors is an integer number (4519025).

Almost surely, 2^74720900 is an apocalyptic number.

It is an amenable number.

74720900 is an abundant number, since it is smaller than the sum of its proper divisors (87964000).

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

74720900 is a wasteful number, since it uses less digits than its factorization.

74720900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2504 (or 2497 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 74720900 is about 8644.1251726245. The cubic root of 74720900 is about 421.1925667281.

The spelling of 74720900 in words is "seventy-four million, seven hundred twenty thousand, nine hundred".