22643439 has 72 divisors (see below), whose sum is σ = 41157648. Its totient is φ = 10967040.

The previous prime is 22643419. The next prime is 22643441. The reversal of 22643439 is 93434622.

It is not a de Polignac number, because 22643439 - 2⁵ = 22643407 is a prime.

Its product of digits (31104) is a multiple of the sum of its prime divisors (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22643419) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 552259 + ... + 552299.

It is an arithmetic number, because the mean of its divisors is an integer number (571634).

Almost surely, 2^22643439 is an apocalyptic number.

22643439 is a deficient number, since it is larger than the sum of its proper divisors (18514209).

22643439 is a wasteful number, since it uses less digits than its factorization.

22643439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 81 counting only the distinct ones).

The product of its digits is 31104, while the sum is 33.

The square root of 22643439 is about 4758.5122675055. The cubic root of 22643439 is about 282.9094550659.

The spelling of 22643439 in words is "twenty-two million, six hundred forty-three thousand, four hundred thirty-nine".