22043638 has 24 divisors (see below), whose sum is σ = 34747272. Its totient is φ = 10485504.

The previous prime is 22043633. The next prime is 22043647. The reversal of 22043638 is 83634022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22043633) 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, 227206 + ... + 227302.

It is an arithmetic number, because the mean of its divisors is an integer number (1447803).

Almost surely, 2^22043638 is an apocalyptic number.

22043638 is a deficient number, since it is larger than the sum of its proper divisors (12703634).

22043638 is an equidigital number, since it uses as much as digits as its factorization.

22043638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 22043638 is about 4695.0652817613. The cubic root of 22043638 is about 280.3890764519.

The spelling of 22043638 in words is "twenty-two million, forty-three thousand, six hundred thirty-eight".