22544004 has 48 divisors (see below), whose sum is σ = 60368000. Its totient is φ = 6414336.

The previous prime is 22544003. The next prime is 22544017. The reversal of 22544004 is 40044522.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (22544003) 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, 28932 + ... + 29700.

Almost surely, 2^22544004 is an apocalyptic number.

It is an amenable number.

22544004 is an abundant number, since it is smaller than the sum of its proper divisors (37823996).

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

22544004 is a wasteful number, since it uses less digits than its factorization.

22544004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132 (or 1130 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 22544004 is about 4748.0526534570. The cubic root of 22544004 is about 282.4947303687.

Adding to 22544004 its reverse (40044522), we get a palindrome (62588526).

The spelling of 22544004 in words is "twenty-two million, five hundred forty-four thousand, four".