73380728 has 8 divisors (see below), whose sum is σ = 137588880. Its totient is φ = 36690360.

The previous prime is 73380709. The next prime is 73380733. The reversal of 73380728 is 82708337.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 73380691 and 73380700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4586288 + ... + 4586303.

It is an arithmetic number, because the mean of its divisors is an integer number (17198610).

Almost surely, 2^73380728 is an apocalyptic number.

It is an amenable number.

73380728 is a deficient number, since it is larger than the sum of its proper divisors (64208152).

73380728 is a wasteful number, since it uses less digits than its factorization.

73380728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9172597 (or 9172593 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 73380728 is about 8566.2551911556. The cubic root of 73380728 is about 418.6592315925.

The spelling of 73380728 in words is "seventy-three million, three hundred eighty thousand, seven hundred twenty-eight".