22640088 has 32 divisors (see below), whose sum is σ = 57807360. Its totient is φ = 7385760.

The previous prime is 22640083. The next prime is 22640113. The reversal of 22640088 is 88004622.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22640083) 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, 8908 + ... + 11163.

It is an arithmetic number, because the mean of its divisors is an integer number (1806480).

Almost surely, 2^22640088 is an apocalyptic number.

It is an amenable number.

22640088 is an abundant number, since it is smaller than the sum of its proper divisors (35167272).

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

22640088 is a wasteful number, since it uses less digits than its factorization.

22640088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20127 (or 20123 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 22640088 is about 4758.1601486289. The cubic root of 22640088 is about 282.8954984645.

The spelling of 22640088 in words is "twenty-two million, six hundred forty thousand, eighty-eight".