22297872 has 20 divisors (see below), whose sum is σ = 57602960. Its totient is φ = 7432608.

The previous prime is 22297861. The next prime is 22297883. The reversal of 22297872 is 27879222.

It is an interprime number because it is at equal distance from previous prime (22297861) and next prime (22297883).

It is a self number, because there is not a number n which added to its sum of digits gives 22297872.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232222 + ... + 232317.

It is an arithmetic number, because the mean of its divisors is an integer number (2880148).

Almost surely, 2^22297872 is an apocalyptic number.

It is an amenable number.

22297872 is an abundant number, since it is smaller than the sum of its proper divisors (35305088).

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

22297872 is a wasteful number, since it uses less digits than its factorization.

22297872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464550 (or 464544 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 22297872 is about 4722.0622613430. The cubic root of 22297872 is about 281.4628879035.

It can be divided in two parts, 2229 and 7872, that added together give a palindrome (10101).

The spelling of 22297872 in words is "twenty-two million, two hundred ninety-seven thousand, eight hundred seventy-two".