73112728 has 32 divisors (see below), whose sum is σ = 151074000. Its totient is φ = 32957568.

The previous prime is 73112723. The next prime is 73112737. The reversal of 73112728 is 82721137.

It is a self number, because there is not a number n which added to its sum of digits gives 73112728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73112723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3703 + ... + 12646.

Almost surely, 2^73112728 is an apocalyptic number.

It is an amenable number.

73112728 is an abundant number, since it is smaller than the sum of its proper divisors (77961272).

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

73112728 is a wasteful number, since it uses less digits than its factorization.

73112728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16411 (or 16407 counting only the distinct ones).

The product of its digits is 4704, while the sum is 31.

The square root of 73112728 is about 8550.5981077349. The cubic root of 73112728 is about 418.1489361898.

The spelling of 73112728 in words is "seventy-three million, one hundred twelve thousand, seven hundred twenty-eight".