22240344 has 32 divisors (see below), whose sum is σ = 63544320. Its totient is φ = 6354336.

The previous prime is 22240343. The next prime is 22240349. The reversal of 22240344 is 44304222.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 22240344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22240343) 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, 66024 + ... + 66359.

It is an arithmetic number, because the mean of its divisors is an integer number (1985760).

Almost surely, 2^22240344 is an apocalyptic number.

22240344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22240344 is an abundant number, since it is smaller than the sum of its proper divisors (41303976).

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

22240344 is a wasteful number, since it uses less digits than its factorization.

22240344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132399 (or 132395 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 22240344 is about 4715.9669210036. The cubic root of 22240344 is about 281.2206234996.

Adding to 22240344 its reverse (44304222), we get a palindrome (66544566).

The spelling of 22240344 in words is "twenty-two million, two hundred forty thousand, three hundred forty-four".