22660440 has 64 divisors (see below), whose sum is σ = 74165760. Its totient is φ = 5493120.

The previous prime is 22660433. The next prime is 22660447. The reversal of 22660440 is 4406622.

It is an interprime number because it is at equal distance from previous prime (22660433) and next prime (22660447).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22660440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22660447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7264 + ... + 9903.

It is an arithmetic number, because the mean of its divisors is an integer number (1158840).

Almost surely, 2^22660440 is an apocalyptic number.

22660440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22660440 is an abundant number, since it is smaller than the sum of its proper divisors (51505320).

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

22660440 is a wasteful number, since it uses less digits than its factorization.

22660440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17192 (or 17188 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 22660440 is about 4760.2983099802. The cubic root of 22660440 is about 282.9802414337.

The spelling of 22660440 in words is "twenty-two million, six hundred sixty thousand, four hundred forty".