22159638 has 12 divisors (see below), whose sum is σ = 48012588. Its totient is φ = 7386540.

The previous prime is 22159601. The next prime is 22159667. The reversal of 22159638 is 83695122.

22159638 is a `hidden beast` number, since 2 + 2 + 15 + 9 + 638 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 615528 + ... + 615563.

It is an arithmetic number, because the mean of its divisors is an integer number (4001049).

Almost surely, 2^22159638 is an apocalyptic number.

22159638 is an abundant number, since it is smaller than the sum of its proper divisors (25852950).

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

22159638 is a wasteful number, since it uses less digits than its factorization.

22159638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231099 (or 1231096 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 22159638 is about 4707.4024684533. The cubic root of 22159638 is about 280.8800457263.

The spelling of 22159638 in words is "twenty-two million, one hundred fifty-nine thousand, six hundred thirty-eight".