72860728 has 8 divisors (see below), whose sum is σ = 136613880. Its totient is φ = 36430360.

The previous prime is 72860681. The next prime is 72860737. The reversal of 72860728 is 82706827.

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

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, 4553788 + ... + 4553803.

It is an arithmetic number, because the mean of its divisors is an integer number (17076735).

Almost surely, 2^72860728 is an apocalyptic number.

It is an amenable number.

72860728 is a deficient number, since it is larger than the sum of its proper divisors (63753152).

72860728 is a wasteful number, since it uses less digits than its factorization.

72860728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9107597 (or 9107593 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 72860728 is about 8535.8495769314. The cubic root of 72860728 is about 417.6679673629.

The spelling of 72860728 in words is "seventy-two million, eight hundred sixty thousand, seven hundred twenty-eight".