22344140 has 48 divisors (see below), whose sum is σ = 57755712. Its totient is φ = 7070976.

The previous prime is 22344107. The next prime is 22344143. The reversal of 22344140 is 4144322.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (22344143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4319 + ... + 7958.

It is an arithmetic number, because the mean of its divisors is an integer number (1203244).

Almost surely, 2^22344140 is an apocalyptic number.

22344140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22344140 is an abundant number, since it is smaller than the sum of its proper divisors (35411572).

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

22344140 is a wasteful number, since it uses less digits than its factorization.

22344140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12306 (or 12304 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 22344140 is about 4726.9588532163. The cubic root of 22344140 is about 281.6574315487.

Adding to 22344140 its reverse (4144322), we get a palindrome (26488462).

The spelling of 22344140 in words is "twenty-two million, three hundred forty-four thousand, one hundred forty".