22443920 has 20 divisors (see below), whose sum is σ = 52182300. Its totient is φ = 8977536.

The previous prime is 22443919. The next prime is 22443943. The reversal of 22443920 is 2934422.

It can be written as a sum of positive squares in 2 ways, for example, as 12306064 + 10137856 = 3508^2 + 3184^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 22443920.

It is an unprimeable number.

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, 140195 + ... + 140354.

It is an arithmetic number, because the mean of its divisors is an integer number (2609115).

Almost surely, 2^22443920 is an apocalyptic number.

22443920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22443920 is an abundant number, since it is smaller than the sum of its proper divisors (29738380).

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

22443920 is a wasteful number, since it uses less digits than its factorization.

22443920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280562 (or 280556 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 22443920 is about 4737.5014511871. The cubic root of 22443920 is about 282.0760655259.

It can be divided in two parts, 224 and 43920, that added together give a palindrome (44144).

The spelling of 22443920 in words is "twenty-two million, four hundred forty-three thousand, nine hundred twenty".