72249972 has 12 divisors (see below), whose sum is σ = 168583296. Its totient is φ = 24083320.

The previous prime is 72249959. The next prime is 72249973. The reversal of 72249972 is 27994227.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72249973) 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 3 ways as a sum of consecutive naturals, for example, 3010404 + ... + 3010427.

It is an arithmetic number, because the mean of its divisors is an integer number (14048608).

Almost surely, 2^72249972 is an apocalyptic number.

It is an amenable number.

72249972 is an abundant number, since it is smaller than the sum of its proper divisors (96333324).

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

72249972 is a wasteful number, since it uses less digits than its factorization.

72249972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6020838 (or 6020836 counting only the distinct ones).

The product of its digits is 127008, while the sum is 42.

The square root of 72249972 is about 8499.9983529410. The cubic root of 72249972 is about 416.4976554716.

The spelling of 72249972 in words is "seventy-two million, two hundred forty-nine thousand, nine hundred seventy-two".