22915872 has 144 divisors (see below), whose sum is σ = 77418432. Its totient is φ = 6531840.

The previous prime is 22915859. The next prime is 22915873. The reversal of 22915872 is 27851922.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (22915873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54222 + ... + 54642.

It is an arithmetic number, because the mean of its divisors is an integer number (537628).

Almost surely, 2^22915872 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 22915872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38709216).

22915872 is an abundant number, since it is smaller than the sum of its proper divisors (54502560).

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

22915872 is an equidigital number, since it uses as much as digits as its factorization.

22915872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 433 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 22915872 is about 4787.0525378358. The cubic root of 22915872 is about 284.0395369145.

The spelling of 22915872 in words is "twenty-two million, nine hundred fifteen thousand, eight hundred seventy-two".