72993556 has 12 divisors (see below), whose sum is σ = 127958292. Its totient is φ = 36434048.

The previous prime is 72993523. The next prime is 72993577. The reversal of 72993556 is 65539927.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23853456 + 49140100 = 4884^2 + 7010^2 .

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, 13015 + ... + 17758.

It is an arithmetic number, because the mean of its divisors is an integer number (10663191).

Almost surely, 2^72993556 is an apocalyptic number.

It is an amenable number.

72993556 is a deficient number, since it is larger than the sum of its proper divisors (54964736).

72993556 is a wasteful number, since it uses less digits than its factorization.

72993556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31370 (or 31368 counting only the distinct ones).

The product of its digits is 510300, while the sum is 46.

The square root of 72993556 is about 8543.6266304187. The cubic root of 72993556 is about 417.9216217138.

The spelling of 72993556 in words is "seventy-two million, nine hundred ninety-three thousand, five hundred fifty-six".