22440004 has 12 divisors (see below), whose sum is σ = 39312700. Its totient is φ = 11207808.

The previous prime is 22439999. The next prime is 22440031. The reversal of 22440004 is 40004422.

It can be written as a sum of positive squares in 2 ways, for example, as 3097600 + 19342404 = 1760^2 + 4398^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22440004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2032 + ... + 7000.

Almost surely, 2^22440004 is an apocalyptic number.

It is an amenable number.

22440004 is a deficient number, since it is larger than the sum of its proper divisors (16872696).

22440004 is a wasteful number, since it uses less digits than its factorization.

22440004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6102 (or 6100 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 22440004 is about 4737.0881351311. The cubic root of 22440004 is about 282.0596590912.

Adding to 22440004 its reverse (40004422), we get a palindrome (62444426).

It can be divided in two parts, 2244000 and 4, that added together give a square (2244004 = 1498²).

The spelling of 22440004 in words is "twenty-two million, four hundred forty thousand, four".