72717772 has 12 divisors (see below), whose sum is σ = 134741880. Its totient is φ = 34220096.

The previous prime is 72717767. The next prime is 72717781. The reversal of 72717772 is 27771727.

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 in 3 ways as a sum of consecutive naturals, for example, 534622 + ... + 534757.

It is an arithmetic number, because the mean of its divisors is an integer number (11228490).

Almost surely, 2^72717772 is an apocalyptic number.

It is an amenable number.

72717772 is a deficient number, since it is larger than the sum of its proper divisors (62024108).

72717772 is a wasteful number, since it uses less digits than its factorization.

72717772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069400 (or 1069398 counting only the distinct ones).

The product of its digits is 67228, while the sum is 40.

The square root of 72717772 is about 8527.4716065197. The cubic root of 72717772 is about 417.3946274525.

The spelling of 72717772 in words is "seventy-two million, seven hundred seventeen thousand, seven hundred seventy-two".