73913728 has 32 divisors (see below), whose sum is σ = 168287760. Its totient is φ = 31676928.

The previous prime is 73913711. The next prime is 73913759. The reversal of 73913728 is 82731937.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40351 + ... + 42142.

Almost surely, 2^73913728 is an apocalyptic number.

It is an amenable number.

73913728 is an abundant number, since it is smaller than the sum of its proper divisors (94374032).

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

73913728 is an equidigital number, since it uses as much as digits as its factorization.

73913728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82514 (or 82502 counting only the distinct ones).

The product of its digits is 63504, while the sum is 40.

The square root of 73913728 is about 8597.3093465339. The cubic root of 73913728 is about 419.6704292868.

The spelling of 73913728 in words is "seventy-three million, nine hundred thirteen thousand, seven hundred twenty-eight".