72224472 has 64 divisors (see below), whose sum is σ = 191520000. Its totient is φ = 22633344.

The previous prime is 72224461. The next prime is 72224489. The reversal of 72224472 is 27442227.

It is a congruent number.

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, 67413 + ... + 68475.

It is an arithmetic number, because the mean of its divisors is an integer number (2992500).

Almost surely, 2^72224472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72224472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95760000).

72224472 is an abundant number, since it is smaller than the sum of its proper divisors (119295528).

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

72224472 is a wasteful number, since it uses less digits than its factorization.

72224472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240 (or 1236 counting only the distinct ones).

The product of its digits is 12544, while the sum is 30.

The square root of 72224472 is about 8498.4982202740. The cubic root of 72224472 is about 416.4486499626.

Adding to 72224472 its reverse (27442227), we get a palindrome (99666699).

The spelling of 72224472 in words is "seventy-two million, two hundred twenty-four thousand, four hundred seventy-two".