72938668 has 12 divisors (see below), whose sum is σ = 139246632. Its totient is φ = 33153920.

The previous prime is 72938651. The next prime is 72938693. The reversal of 72938668 is 86683927.

It is a super-2 number, since 2×72938668² = 10640098579228448, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 828805 + ... + 828892.

It is an arithmetic number, because the mean of its divisors is an integer number (11603886).

Almost surely, 2^72938668 is an apocalyptic number.

It is an amenable number.

72938668 is a deficient number, since it is larger than the sum of its proper divisors (66307964).

72938668 is a wasteful number, since it uses less digits than its factorization.

72938668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657712 (or 1657710 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The square root of 72938668 is about 8540.4138073047. The cubic root of 72938668 is about 417.8168424460.

The spelling of 72938668 in words is "seventy-two million, nine hundred thirty-eight thousand, six hundred sixty-eight".