72709744 has 10 divisors (see below), whose sum is σ = 140875160. Its totient is φ = 36354864.

The previous prime is 72709733. The next prime is 72709753. The reversal of 72709744 is 44790727.

It is a junction number, because it is equal to n+sod(n) for n = 72709697 and 72709706.

It is a congruent number.

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, 2272164 + ... + 2272195.

It is an arithmetic number, because the mean of its divisors is an integer number (14087516).

Almost surely, 2^72709744 is an apocalyptic number.

It is an amenable number.

72709744 is a deficient number, since it is larger than the sum of its proper divisors (68165416).

72709744 is a wasteful number, since it uses less digits than its factorization.

72709744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4544367 (or 4544361 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 72709744 is about 8527.0008795590. Note that the first 3 decimals coincide. The cubic root of 72709744 is about 417.3792668454.

The spelling of 72709744 in words is "seventy-two million, seven hundred nine thousand, seven hundred forty-four".