22401944 has 16 divisors (see below), whose sum is σ = 42162720. Its totient is φ = 11158560.

The previous prime is 22401889. The next prime is 22401947. The reversal of 22401944 is 44910422.

It is a Smith number, since the sum of its digits (26) 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 (22401947) 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 3 ways as a sum of consecutive naturals, for example, 2999 + ... + 7334.

It is an arithmetic number, because the mean of its divisors is an integer number (2635170).

Almost surely, 2^22401944 is an apocalyptic number.

It is an amenable number.

22401944 is a deficient number, since it is larger than the sum of its proper divisors (19760776).

22401944 is a wasteful number, since it uses less digits than its factorization.

22401944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10610 (or 10606 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 22401944 is about 4733.0691945079. The cubic root of 22401944 is about 281.9001037781.

The spelling of 22401944 in words is "twenty-two million, four hundred one thousand, nine hundred forty-four".