72513868 has 24 divisors (see below), whose sum is σ = 145242272. Its totient is φ = 31031424.

The previous prime is 72513853. The next prime is 72513869. The reversal of 72513868 is 86831527.

It is a super-2 number, since 2×72513868² = 10516522104642848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72513868.

It is not an unprimeable number, because it can be changed into a prime (72513869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23080 + ... + 26032.

Almost surely, 2^72513868 is an apocalyptic number.

It is an amenable number.

72513868 is an abundant number, since it is smaller than the sum of its proper divisors (72728404).

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

72513868 is a wasteful number, since it uses less digits than its factorization.

72513868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3841 (or 3839 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 72513868 is about 8515.5075010242. The cubic root of 72513868 is about 417.0041309469.

The spelling of 72513868 in words is "seventy-two million, five hundred thirteen thousand, eight hundred sixty-eight".