72704144 has 10 divisors (see below), whose sum is σ = 140864310. Its totient is φ = 36352064.

The previous prime is 72704117. The next prime is 72704153. The reversal of 72704144 is 44140727.

It can be written as a sum of positive squares in only one way, i.e., 72454144 + 250000 = 8512^2 + 500^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2271989 + ... + 2272020.

It is an arithmetic number, because the mean of its divisors is an integer number (14086431).

Almost surely, 2^72704144 is an apocalyptic number.

It is an amenable number.

72704144 is a deficient number, since it is larger than the sum of its proper divisors (68160166).

72704144 is a wasteful number, since it uses less digits than its factorization.

72704144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4544017 (or 4544011 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 29.

The square root of 72704144 is about 8526.6725045589. The cubic root of 72704144 is about 417.3685512531.

The spelling of 72704144 in words is "seventy-two million, seven hundred four thousand, one hundred forty-four".