22397628 has 48 divisors (see below), whose sum is σ = 58988160. Its totient is φ = 6552000.

The previous prime is 22397623. The next prime is 22397707. The reversal of 22397628 is 82679322.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22397623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 903 + ... + 6753.

It is an arithmetic number, because the mean of its divisors is an integer number (1228920).

Almost surely, 2^22397628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22397628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29494080).

22397628 is an abundant number, since it is smaller than the sum of its proper divisors (36590532).

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

22397628 is a wasteful number, since it uses less digits than its factorization.

22397628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5898 (or 5896 counting only the distinct ones).

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

The square root of 22397628 is about 4732.6132316089. The cubic root of 22397628 is about 281.8819988167.

The spelling of 22397628 in words is "twenty-two million, three hundred ninety-seven thousand, six hundred twenty-eight".