22945720 has 96 divisors (see below), whose sum is σ = 62791200. Its totient is φ = 7510272.

The previous prime is 22945687. The next prime is 22945723. The reversal of 22945720 is 2754922.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22945723) 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, 44826 + ... + 45334.

It is an arithmetic number, because the mean of its divisors is an integer number (654075).

Almost surely, 2^22945720 is an apocalyptic number.

22945720 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 22945720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31395600).

22945720 is an abundant number, since it is smaller than the sum of its proper divisors (39845480).

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

22945720 is a wasteful number, since it uses less digits than its factorization.

22945720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 22945720 is about 4790.1690993116. The cubic root of 22945720 is about 284.1628042272.

The spelling of 22945720 in words is "twenty-two million, nine hundred forty-five thousand, seven hundred twenty".