22907720 has 48 divisors (see below), whose sum is σ = 56665980. Its totient is φ = 8328320.

The previous prime is 22907693. The next prime is 22907723. The reversal of 22907720 is 2770922.

It can be written as a sum of positive squares in 2 ways, for example, as 21548164 + 1359556 = 4642^2 + 1166^2 .

It is not an unprimeable number, because it can be changed into a prime (22907723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2474 + ... + 7206.

Almost surely, 2^22907720 is an apocalyptic number.

22907720 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 22907720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28332990).

22907720 is an abundant number, since it is smaller than the sum of its proper divisors (33758260).

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

22907720 is a wasteful number, since it uses less digits than its factorization.

22907720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4766 (or 4751 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 22907720 is about 4786.2009987045. The cubic root of 22907720 is about 284.0058518929.

The spelling of 22907720 in words is "twenty-two million, nine hundred seven thousand, seven hundred twenty".