22400443 has 6 divisors (see below), whose sum is σ = 24256284. Its totient is φ = 20677176.

The previous prime is 22400431. The next prime is 22400447. The reversal of 22400443 is 34400422.

It is a de Polignac number, because none of the positive numbers 2^k-22400443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22400443.

It is not an unprimeable number, because it can be changed into a prime (22400447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66105 + ... + 66442.

It is an arithmetic number, because the mean of its divisors is an integer number (4042714).

Almost surely, 2^22400443 is an apocalyptic number.

22400443 is a deficient number, since it is larger than the sum of its proper divisors (1855841).

22400443 is a wasteful number, since it uses less digits than its factorization.

22400443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132573 (or 132560 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 22400443 is about 4732.9106266652. The cubic root of 22400443 is about 281.8938075759.

Adding to 22400443 its reverse (34400422), we get a palindrome (56800865).

The spelling of 22400443 in words is "twenty-two million, four hundred thousand, four hundred forty-three".