22638860 has 12 divisors (see below), whose sum is σ = 47541648. Its totient is φ = 9055536.

The previous prime is 22638859. The next prime is 22638871. The reversal of 22638860 is 6883622.

It is a self number, because there is not a number n which added to its sum of digits gives 22638860.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565952 + ... + 565991.

It is an arithmetic number, because the mean of its divisors is an integer number (3961804).

Almost surely, 2^22638860 is an apocalyptic number.

22638860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22638860 is an abundant number, since it is smaller than the sum of its proper divisors (24902788).

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

22638860 is a wasteful number, since it uses less digits than its factorization.

22638860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131952 (or 1131950 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 22638860 is about 4758.0311054048. The cubic root of 22638860 is about 282.8903836147.

The spelling of 22638860 in words is "twenty-two million, six hundred thirty-eight thousand, eight hundred sixty".