72615928 has 32 divisors (see below), whose sum is σ = 169752960. Its totient is φ = 28291680.

The previous prime is 72615911. The next prime is 72615979. The reversal of 72615928 is 82951627.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58326 + ... + 59557.

It is an arithmetic number, because the mean of its divisors is an integer number (5304780).

Almost surely, 2^72615928 is an apocalyptic number.

It is an amenable number.

72615928 is an abundant number, since it is smaller than the sum of its proper divisors (97137032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72615928 is a wasteful number, since it uses less digits than its factorization.

72615928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117907 (or 117903 counting only the distinct ones).

The product of its digits is 60480, while the sum is 40.

The square root of 72615928 is about 8521.4979903770. The cubic root of 72615928 is about 417.1996774060.

The spelling of 72615928 in words is "seventy-two million, six hundred fifteen thousand, nine hundred twenty-eight".