74991100 has 72 divisors (see below), whose sum is σ = 177332400. Its totient is φ = 27417600.

The previous prime is 74991089. The next prime is 74991101. The reversal of 74991100 is 119947.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74991101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54420 + ... + 55780.

It is an arithmetic number, because the mean of its divisors is an integer number (2462950).

Almost surely, 2^74991100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74991100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88666200).

74991100 is an abundant number, since it is smaller than the sum of its proper divisors (102341300).

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

74991100 is a wasteful number, since it uses less digits than its factorization.

74991100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423 (or 1416 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 74991100 is about 8659.7401808599. The cubic root of 74991100 is about 421.6996507672.

The spelling of 74991100 in words is "seventy-four million, nine hundred ninety-one thousand, one hundred".