72240472 has 16 divisors (see below), whose sum is σ = 137473560. Its totient is φ = 35580864.

The previous prime is 72240449. The next prime is 72240481. The reversal of 72240472 is 27404227.

It is a self number, because there is not a number n which added to its sum of digits gives 72240472.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66853 + ... + 67924.

Almost surely, 2^72240472 is an apocalyptic number.

It is an amenable number.

72240472 is a deficient number, since it is larger than the sum of its proper divisors (65233088).

72240472 is a wasteful number, since it uses less digits than its factorization.

72240472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134850 (or 134846 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 72240472 is about 8499.4395109325. The cubic root of 72240472 is about 416.4793998651.

Adding to 72240472 its reverse (27404227), we get a palindrome (99644699).

The spelling of 72240472 in words is "seventy-two million, two hundred forty thousand, four hundred seventy-two".