22042404 has 36 divisors (see below), whose sum is σ = 58997484. Its totient is φ = 6915072.

The previous prime is 22042357. The next prime is 22042429. The reversal of 22042404 is 40424022.

22042404 is a `hidden beast` number, since 220 + 42 + 404 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14424804 + 7617600 = 3798^2 + 2760^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17397 + ... + 18620.

It is an arithmetic number, because the mean of its divisors is an integer number (1638819).

Almost surely, 2^22042404 is an apocalyptic number.

It is an amenable number.

22042404 is an abundant number, since it is smaller than the sum of its proper divisors (36955080).

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

22042404 is a wasteful number, since it uses less digits than its factorization.

22042404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36044 (or 36039 counting only the distinct ones).

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

The square root of 22042404 is about 4694.9338653489. The cubic root of 22042404 is about 280.3838443062.

Adding to 22042404 its reverse (40424022), we get a palindrome (62466426).

It can be divided in two parts, 220 and 42404, that added together give a palindrome (42624).

The spelling of 22042404 in words is "twenty-two million, forty-two thousand, four hundred four".