22638856 has 16 divisors (see below), whose sum is σ = 42559740. Its totient is φ = 11289600.

The previous prime is 22638853. The next prime is 22638859. The reversal of 22638856 is 65883622.

It is an interprime number because it is at equal distance from previous prime (22638853) and next prime (22638859).

It can be written as a sum of positive squares in 2 ways, for example, as 12716356 + 9922500 = 3566^2 + 3150^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22638853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321 + ... + 6736.

Almost surely, 2^22638856 is an apocalyptic number.

It is an amenable number.

22638856 is a deficient number, since it is larger than the sum of its proper divisors (19920884).

22638856 is a wasteful number, since it uses less digits than its factorization.

22638856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7464 (or 7460 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 22638856 is about 4758.0306850629. The cubic root of 22638856 is about 282.8903669536.

The spelling of 22638856 in words is "twenty-two million, six hundred thirty-eight thousand, eight hundred fifty-six".