22040644 has 12 divisors (see below), whose sum is σ = 38613484. Its totient is φ = 11008224.

The previous prime is 22040621. The next prime is 22040663. The reversal of 22040644 is 44604022.

It can be written as a sum of positive squares in 2 ways, for example, as 3378244 + 18662400 = 1838^2 + 4320^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2002 + ... + 6934.

Almost surely, 2^22040644 is an apocalyptic number.

It is an amenable number.

22040644 is a deficient number, since it is larger than the sum of its proper divisors (16572840).

22040644 is a wasteful number, since it uses less digits than its factorization.

22040644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6054 (or 6052 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 22040644 is about 4694.7464255272. The cubic root of 22040644 is about 280.3763815888.

Adding to 22040644 its reverse (44604022), we get a palindrome (66644666).

The spelling of 22040644 in words is "twenty-two million, forty thousand, six hundred forty-four".