22649172 has 72 divisors (see below), whose sum is σ = 66227616. Its totient is φ = 5971392.

The previous prime is 22649131. The next prime is 22649173. The reversal of 22649172 is 27194622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22649173) 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, 6163 + ... + 9125.

It is an arithmetic number, because the mean of its divisors is an integer number (919828).

Almost surely, 2^22649172 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 22649172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33113808).

22649172 is an abundant number, since it is smaller than the sum of its proper divisors (43578444).

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

22649172 is a wasteful number, since it uses less digits than its factorization.

22649172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2997 (or 2988 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 22649172 is about 4759.1146235408. The cubic root of 22649172 is about 282.9333292816.

The spelling of 22649172 in words is "twenty-two million, six hundred forty-nine thousand, one hundred seventy-two".