74397564 has 18 divisors (see below), whose sum is σ = 188060600. Its totient is φ = 24799176.

The previous prime is 74397527. The next prime is 74397581. The reversal of 74397564 is 46579347.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1033264 + ... + 1033335.

Almost surely, 2^74397564 is an apocalyptic number.

It is an amenable number.

74397564 is an abundant number, since it is smaller than the sum of its proper divisors (113663036).

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

74397564 is a wasteful number, since it uses less digits than its factorization.

74397564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066609 (or 2066604 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 74397564 is about 8625.4022514895. The cubic root of 74397564 is about 420.5841531457.

The spelling of 74397564 in words is "seventy-four million, three hundred ninety-seven thousand, five hundred sixty-four".