72718736 has 10 divisors (see below), whose sum is σ = 140892582. Its totient is φ = 36359360.

The previous prime is 72718717. The next prime is 72718759. The reversal of 72718736 is 63781727.

It can be written as a sum of positive squares in only one way, i.e., 55413136 + 17305600 = 7444^2 + 4160^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72718693 and 72718702.

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, 2272445 + ... + 2272476.

Almost surely, 2^72718736 is an apocalyptic number.

It is an amenable number.

72718736 is a deficient number, since it is larger than the sum of its proper divisors (68173846).

72718736 is a wasteful number, since it uses less digits than its factorization.

72718736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4544929 (or 4544923 counting only the distinct ones).

The product of its digits is 98784, while the sum is 41.

The square root of 72718736 is about 8527.5281295344. The cubic root of 72718736 is about 417.3964718739.

The spelling of 72718736 in words is "seventy-two million, seven hundred eighteen thousand, seven hundred thirty-six".