74890520 has 32 divisors (see below), whose sum is σ = 172426320. Its totient is φ = 29258880.

The previous prime is 74890511. The next prime is 74890547. The reversal of 74890520 is 2509847.

It is a happy number.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20051 + ... + 23490.

Almost surely, 2^74890520 is an apocalyptic number.

It is an amenable number.

74890520 is an abundant number, since it is smaller than the sum of its proper divisors (97535800).

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

74890520 is a wasteful number, since it uses less digits than its factorization.

74890520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43595 (or 43591 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 74890520 is about 8653.9308987304. The cubic root of 74890520 is about 421.5110349291.

The spelling of 74890520 in words is "seventy-four million, eight hundred ninety thousand, five hundred twenty".