22289943 has 16 divisors (see below), whose sum is σ = 32096736. Its totient is φ = 13678080.

The previous prime is 22289923. The next prime is 22289957. The reversal of 22289943 is 34998222.

It is a happy number.

It is not a de Polignac number, because 22289943 - 2⁶ = 22289879 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22289903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19771 + ... + 20867.

It is an arithmetic number, because the mean of its divisors is an integer number (2006046).

Almost surely, 2^22289943 is an apocalyptic number.

22289943 is a deficient number, since it is larger than the sum of its proper divisors (9806793).

22289943 is a wasteful number, since it uses less digits than its factorization.

22289943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634.

The product of its digits is 62208, while the sum is 39.

The square root of 22289943 is about 4721.2226170771. Note that the first 3 decimals coincide. The cubic root of 22289943 is about 281.4295217327.

It can be divided in two parts, 22289 and 943, that added together give a palindrome (23232).

The spelling of 22289943 in words is "twenty-two million, two hundred eighty-nine thousand, nine hundred forty-three".