22572320 has 48 divisors (see below), whose sum is σ = 54105408. Its totient is φ = 8897280.

The previous prime is 22572317. The next prime is 22572401. The reversal of 22572320 is 2327522.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10367 + ... + 12353.

It is an arithmetic number, because the mean of its divisors is an integer number (1127196).

Almost surely, 2^22572320 is an apocalyptic number.

22572320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22572320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27052704).

22572320 is an abundant number, since it is smaller than the sum of its proper divisors (31533088).

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

22572320 is a wasteful number, since it uses less digits than its factorization.

22572320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2073 (or 2065 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 22572320 is about 4751.0335717610. The cubic root of 22572320 is about 282.6129550649.

Adding to 22572320 its reverse (2327522), we get a palindrome (24899842).

The spelling of 22572320 in words is "twenty-two million, five hundred seventy-two thousand, three hundred twenty".