22297638 has 24 divisors (see below), whose sum is σ = 49019544. Its totient is φ = 6756640.

The previous prime is 22297637. The next prime is 22297651. The reversal of 22297638 is 83679222.

It is a junction number, because it is equal to n+sod(n) for n = 22297596 and 22297605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22297637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14631 + ... + 16082.

It is an arithmetic number, because the mean of its divisors is an integer number (2042481).

Almost surely, 2^22297638 is an apocalyptic number.

22297638 is an abundant number, since it is smaller than the sum of its proper divisors (26721906).

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

22297638 is a wasteful number, since it uses less digits than its factorization.

22297638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30740 (or 30729 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 22297638 is about 4722.0374839681. The cubic root of 22297638 is about 281.4619033171.

The spelling of 22297638 in words is "twenty-two million, two hundred ninety-seven thousand, six hundred thirty-eight".