22465720 has 64 divisors (see below), whose sum is σ = 53071200. Its totient is φ = 8547840.

The previous prime is 22465711. The next prime is 22465727. The reversal of 22465720 is 2756422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22465727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124030 + ... + 124210.

Almost surely, 2^22465720 is an apocalyptic number.

22465720 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 22465720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26535600).

22465720 is an abundant number, since it is smaller than the sum of its proper divisors (30605480).

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

22465720 is a wasteful number, since it uses less digits than its factorization.

22465720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 22465720 is about 4739.8016836150. The cubic root of 22465720 is about 282.1673637239.

The spelling of 22465720 in words is "twenty-two million, four hundred sixty-five thousand, seven hundred twenty".