72749032 has 8 divisors (see below), whose sum is σ = 136404450. Its totient is φ = 36374512.

The previous prime is 72749021. The next prime is 72749051. The reversal of 72749032 is 23094727.

It can be written as a sum of positive squares in only one way, i.e., 44169316 + 28579716 = 6646^2 + 5346^2 .

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

It is an alternating number because its digits alternate between odd and even.

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 as a sum of consecutive naturals, namely, 4546807 + ... + 4546822.

Almost surely, 2^72749032 is an apocalyptic number.

It is an amenable number.

72749032 is a deficient number, since it is larger than the sum of its proper divisors (63655418).

72749032 is a wasteful number, since it uses less digits than its factorization.

72749032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9093635 (or 9093631 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 72749032 is about 8529.3043092623. The cubic root of 72749032 is about 417.4544289127.

The spelling of 72749032 in words is "seventy-two million, seven hundred forty-nine thousand, thirty-two".