72491272 has 32 divisors (see below), whose sum is σ = 156150720. Its totient is φ = 30905280.

The previous prime is 72491267. The next prime is 72491273. The reversal of 72491272 is 27219427.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (72491273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7747 + ... + 14317.

It is an arithmetic number, because the mean of its divisors is an integer number (4879710).

Almost surely, 2^72491272 is an apocalyptic number.

It is an amenable number.

72491272 is an abundant number, since it is smaller than the sum of its proper divisors (83659448).

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

72491272 is a wasteful number, since it uses less digits than its factorization.

72491272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6781 (or 6777 counting only the distinct ones).

The product of its digits is 14112, while the sum is 34.

The square root of 72491272 is about 8514.1806417294. The cubic root of 72491272 is about 416.9608123169.

The spelling of 72491272 in words is "seventy-two million, four hundred ninety-one thousand, two hundred seventy-two".