72729522 has 16 divisors (see below), whose sum is σ = 161621280. Its totient is φ = 24243156.

The previous prime is 72729521. The next prime is 72729529. The reversal of 72729522 is 22592727.

It is not an unprimeable number, because it can be changed into a prime (72729521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673368 + ... + 673475.

It is an arithmetic number, because the mean of its divisors is an integer number (10101330).

Almost surely, 2^72729522 is an apocalyptic number.

72729522 is an abundant number, since it is smaller than the sum of its proper divisors (88891758).

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

72729522 is a wasteful number, since it uses less digits than its factorization.

72729522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346854 (or 1346848 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 72729522 is about 8528.1605285079. The cubic root of 72729522 is about 417.4171076185.

The spelling of 72729522 in words is "seventy-two million, seven hundred twenty-nine thousand, five hundred twenty-two".