22645008 has 100 divisors (see below), whose sum is σ = 66572748. Its totient is φ = 7430400.

The previous prime is 22644943. The next prime is 22645009. The reversal of 22645008 is 80054622.

It can be written as a sum of positive squares in 2 ways, for example, as 21233664 + 1411344 = 4608^2 + 1188^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22645009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 130810 + ... + 130982.

Almost surely, 2^22645008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22645008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33286374).

22645008 is an abundant number, since it is smaller than the sum of its proper divisors (43927740).

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

22645008 is a wasteful number, since it uses less digits than its factorization.

22645008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 22645008 is about 4758.6771271016. The cubic root of 22645008 is about 282.9159893307.

The spelling of 22645008 in words is "twenty-two million, six hundred forty-five thousand, eight".