22428297 has 12 divisors (see below), whose sum is σ = 32928324. Its totient is φ = 14706720.

The previous prime is 22428277. The next prime is 22428349. The reversal of 22428297 is 79282422.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12467961 + 9960336 = 3531^2 + 3156^2 .

It is not a de Polignac number, because 22428297 - 2⁶ = 22428233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22428257) 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, 19878 + ... + 20975.

It is an arithmetic number, because the mean of its divisors is an integer number (2744027).

Almost surely, 2^22428297 is an apocalyptic number.

It is an amenable number.

22428297 is a deficient number, since it is larger than the sum of its proper divisors (10500027).

22428297 is a wasteful number, since it uses less digits than its factorization.

22428297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40920 (or 40917 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 22428297 is about 4735.8522992171. The cubic root of 22428297 is about 282.0106001750.

The spelling of 22428297 in words is "twenty-two million, four hundred twenty-eight thousand, two hundred ninety-seven".