22044402 has 24 divisors (see below), whose sum is σ = 47892780. Its totient is φ = 7328160.

The previous prime is 22044377. The next prime is 22044403. The reversal of 22044402 is 20444022.

22044402 is a `hidden beast` number, since 220 + 4 + 440 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21538881 + 505521 = 4641^2 + 711^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22044403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6124 + ... + 9032.

Almost surely, 2^22044402 is an apocalyptic number.

22044402 is an abundant number, since it is smaller than the sum of its proper divisors (25848378).

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

22044402 is a wasteful number, since it uses less digits than its factorization.

22044402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3338 (or 3335 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 22044402 is about 4695.1466430773. The cubic root of 22044402 is about 280.3923157052.

Adding to 22044402 its reverse (20444022), we get a palindrome (42488424).

It can be divided in two parts, 22044 and 402, that multiplied together give a palindrome (8861688).

The spelling of 22044402 in words is "twenty-two million, forty-four thousand, four hundred two".