73751728 has 20 divisors (see below), whose sum is σ = 147504448. Its totient is φ = 35686080.

The previous prime is 73751707. The next prime is 73751737. The reversal of 73751728 is 82715737.

73751728 is an admirable 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, 73851 + ... + 74842.

Almost surely, 2^73751728 is an apocalyptic number.

It is an amenable number.

73751728 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

73751728 is a wasteful number, since it uses less digits than its factorization.

73751728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148732 (or 148726 counting only the distinct ones).

The product of its digits is 82320, while the sum is 40.

The square root of 73751728 is about 8587.8826261192. The cubic root of 73751728 is about 419.3636015760.

The spelling of 73751728 in words is "seventy-three million, seven hundred fifty-one thousand, seven hundred twenty-eight".