22685988 has 24 divisors (see below), whose sum is σ = 57006208. Its totient is φ = 6980256.

The previous prime is 22685977. The next prime is 22685989. The reversal of 22685988 is 88958622.

It is a super-2 number, since 2×22685988² = 1029308103072288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22685989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72556 + ... + 72867.

Almost surely, 2^22685988 is an apocalyptic number.

It is an amenable number.

22685988 is an abundant number, since it is smaller than the sum of its proper divisors (34320220).

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

22685988 is a wasteful number, since it uses less digits than its factorization.

22685988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145443 (or 145441 counting only the distinct ones).

The product of its digits is 552960, while the sum is 48.

The square root of 22685988 is about 4762.9809993322. The cubic root of 22685988 is about 283.0865480481.

It can be divided in two parts, 2268 and 5988, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 22685988 in words is "twenty-two million, six hundred eighty-five thousand, nine hundred eighty-eight".