72918856 has 8 divisors (see below), whose sum is σ = 136722870. Its totient is φ = 36459424.

The previous prime is 72918829. The next prime is 72918893. The reversal of 72918856 is 65881927.

It can be written as a sum of positive squares in only one way, i.e., 62252100 + 10666756 = 7890^2 + 3266^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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, 4557421 + ... + 4557436.

Almost surely, 2^72918856 is an apocalyptic number.

It is an amenable number.

72918856 is a deficient number, since it is larger than the sum of its proper divisors (63804014).

72918856 is a wasteful number, since it uses less digits than its factorization.

72918856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9114863 (or 9114859 counting only the distinct ones).

The product of its digits is 241920, while the sum is 46.

The square root of 72918856 is about 8539.2538315710. The cubic root of 72918856 is about 417.7790091215.

The spelling of 72918856 in words is "seventy-two million, nine hundred eighteen thousand, eight hundred fifty-six".