72637744 has 10 divisors (see below), whose sum is σ = 140735660. Its totient is φ = 36318864.

The previous prime is 72637729. The next prime is 72637751. The reversal of 72637744 is 44773627.

It is a junction number, because it is equal to n+sod(n) for n = 72637697 and 72637706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2269914 + ... + 2269945.

It is an arithmetic number, because the mean of its divisors is an integer number (14073566).

Almost surely, 2^72637744 is an apocalyptic number.

It is an amenable number.

72637744 is a deficient number, since it is larger than the sum of its proper divisors (68097916).

72637744 is a wasteful number, since it uses less digits than its factorization.

72637744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4539867 (or 4539861 counting only the distinct ones).

The product of its digits is 197568, while the sum is 40.

The square root of 72637744 is about 8522.7779508796. Note that the first 3 decimals coincide. The cubic root of 72637744 is about 417.2414529828.

The spelling of 72637744 in words is "seventy-two million, six hundred thirty-seven thousand, seven hundred forty-four".