72244172 has 48 divisors (see below), whose sum is σ = 169757952. Its totient is φ = 25980480.

The previous prime is 72244163. The next prime is 72244187. The reversal of 72244172 is 27144227.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5018 + ... + 13025.

It is an arithmetic number, because the mean of its divisors is an integer number (3536624).

Almost surely, 2^72244172 is an apocalyptic number.

It is an amenable number.

72244172 is an abundant number, since it is smaller than the sum of its proper divisors (97513780).

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

72244172 is a wasteful number, since it uses less digits than its factorization.

72244172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18078 (or 18076 counting only the distinct ones).

The product of its digits is 6272, while the sum is 29.

The square root of 72244172 is about 8499.6571695569. The cubic root of 72244172 is about 416.4865101337.

Adding to 72244172 its reverse (27144227), we get a palindrome (99388399).

The spelling of 72244172 in words is "seventy-two million, two hundred forty-four thousand, one hundred seventy-two".