72144572 has 12 divisors (see below), whose sum is σ = 126431760. Its totient is φ = 36021216.

The previous prime is 72144571. The next prime is 72144581. The reversal of 72144572 is 27544127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72144571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9497 + ... + 15312.

It is an arithmetic number, because the mean of its divisors is an integer number (10535980).

Almost surely, 2^72144572 is an apocalyptic number.

It is an amenable number.

72144572 is a deficient number, since it is larger than the sum of its proper divisors (54287188).

72144572 is a wasteful number, since it uses less digits than its factorization.

72144572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25540 (or 25538 counting only the distinct ones).

The product of its digits is 15680, while the sum is 32.

The square root of 72144572 is about 8493.7960889110. The cubic root of 72144572 is about 416.2950246336.

Adding to 72144572 its reverse (27544127), we get a palindrome (99688699).

The spelling of 72144572 in words is "seventy-two million, one hundred forty-four thousand, five hundred seventy-two".