72543168 has 56 divisors (see below), whose sum is σ = 213268560. Its totient is φ = 24180480.

The previous prime is 72543157. The next prime is 72543187. The reversal of 72543168 is 86134527.

It is a super-2 number, since 2×72543168² = 10525022446952448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 19263 + ... + 22718.

Almost surely, 2^72543168 is an apocalyptic number.

It is an amenable number.

72543168 is an abundant number, since it is smaller than the sum of its proper divisors (140725392).

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

72543168 is a wasteful number, since it uses less digits than its factorization.

72543168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42002 (or 41986 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 72543168 is about 8517.2277179843. The cubic root of 72543168 is about 417.0602883694.

The spelling of 72543168 in words is "seventy-two million, five hundred forty-three thousand, one hundred sixty-eight".