73990920 has 64 divisors (see below), whose sum is σ = 222549120. Its totient is φ = 19679744.

The previous prime is 73990901. The next prime is 73990933. The reversal of 73990920 is 2909937.

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, 77164 + ... + 78116.

It is an arithmetic number, because the mean of its divisors is an integer number (3477330).

Almost surely, 2^73990920 is an apocalyptic number.

It is an amenable number.

73990920 is an abundant number, since it is smaller than the sum of its proper divisors (148558200).

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

73990920 is a wasteful number, since it uses less digits than its factorization.

73990920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614 (or 1610 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 39.

The square root of 73990920 is about 8601.7974865722. The cubic root of 73990920 is about 419.8164731041.

The spelling of 73990920 in words is "seventy-three million, nine hundred ninety thousand, nine hundred twenty".