72615572 has 12 divisors (see below), whose sum is σ = 127293600. Its totient is φ = 36245976.

The previous prime is 72615563. The next prime is 72615581. The reversal of 72615572 is 27551627.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72615563) and next prime (72615581).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12758 + ... + 17549.

It is an arithmetic number, because the mean of its divisors is an integer number (10607800).

Almost surely, 2^72615572 is an apocalyptic number.

It is an amenable number.

72615572 is a deficient number, since it is larger than the sum of its proper divisors (54678028).

72615572 is a wasteful number, since it uses less digits than its factorization.

72615572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30910 (or 30908 counting only the distinct ones).

The product of its digits is 29400, while the sum is 35.

The square root of 72615572 is about 8521.4771020053. The cubic root of 72615572 is about 417.1989956302.

The spelling of 72615572 in words is "seventy-two million, six hundred fifteen thousand, five hundred seventy-two".