22651638 has 32 divisors (see below), whose sum is σ = 47081472. Its totient is φ = 7257600.

The previous prime is 22651609. The next prime is 22651663. The reversal of 22651638 is 83615622.

It is a junction number, because it is equal to n+sod(n) for n = 22651599 and 22651608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35583 + ... + 36213.

It is an arithmetic number, because the mean of its divisors is an integer number (1471296).

Almost surely, 2^22651638 is an apocalyptic number.

22651638 is an abundant number, since it is smaller than the sum of its proper divisors (24429834).

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

22651638 is a wasteful number, since it uses less digits than its factorization.

22651638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860.

The product of its digits is 17280, while the sum is 33.

The square root of 22651638 is about 4759.3736982927. The cubic root of 22651638 is about 282.9435973283.

The spelling of 22651638 in words is "twenty-two million, six hundred fifty-one thousand, six hundred thirty-eight".