72747688 has 32 divisors (see below), whose sum is σ = 147319200. Its totient is φ = 33478848.

The previous prime is 72747673. The next prime is 72747691. The reversal of 72747688 is 88674727.

It is a happy number.

It is a super-2 number, since 2×72747688² = 10584452218690688, which contains 22 as substring.

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, 45283 + ... + 46861.

It is an arithmetic number, because the mean of its divisors is an integer number (4603725).

Almost surely, 2^72747688 is an apocalyptic number.

It is an amenable number.

72747688 is an abundant number, since it is smaller than the sum of its proper divisors (74571512).

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

72747688 is a wasteful number, since it uses less digits than its factorization.

72747688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041 (or 2037 counting only the distinct ones).

The product of its digits is 1053696, while the sum is 49.

The square root of 72747688 is about 8529.2255216989. The cubic root of 72747688 is about 417.4518581467.

The spelling of 72747688 in words is "seventy-two million, seven hundred forty-seven thousand, six hundred eighty-eight".