72737744 has 20 divisors (see below), whose sum is σ = 142249824. Its totient is φ = 36028128.

The previous prime is 72737741. The next prime is 72737759. The reversal of 72737744 is 44773727.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72737741) by changing a digit.

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, 19532 + ... + 22955.

Almost surely, 2^72737744 is an apocalyptic number.

It is an amenable number.

72737744 is a deficient number, since it is larger than the sum of its proper divisors (69512080).

72737744 is a wasteful number, since it uses less digits than its factorization.

72737744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42602 (or 42596 counting only the distinct ones).

The product of its digits is 230496, while the sum is 41.

The square root of 72737744 is about 8528.6425649103. The cubic root of 72737744 is about 417.4328365551.

The spelling of 72737744 in words is "seventy-two million, seven hundred thirty-seven thousand, seven hundred forty-four".