72744968 has 8 divisors (see below), whose sum is σ = 136396830. Its totient is φ = 36372480.

The previous prime is 72744961. The next prime is 72744979. The reversal of 72744968 is 86944727.

It can be written as a sum of positive squares in only one way, i.e., 68591524 + 4153444 = 8282^2 + 2038^2 .

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

It is not an unprimeable number, because it can be changed into a prime (72744961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4546553 + ... + 4546568.

Almost surely, 2^72744968 is an apocalyptic number.

It is an amenable number.

72744968 is a deficient number, since it is larger than the sum of its proper divisors (63651862).

72744968 is a wasteful number, since it uses less digits than its factorization.

72744968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9093127 (or 9093123 counting only the distinct ones).

The product of its digits is 677376, while the sum is 47.

The square root of 72744968 is about 8529.0660684509. The cubic root of 72744968 is about 417.4466553092.

The spelling of 72744968 in words is "seventy-two million, seven hundred forty-four thousand, nine hundred sixty-eight".