22290404 has 24 divisors (see below), whose sum is σ = 41274240. Its totient is φ = 10511424.

The previous prime is 22290343. The next prime is 22290409. The reversal of 22290404 is 40409222.

It is a super-2 number, since 2×22290404² = 993724220966432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 22290404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22290409) 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 7 ways as a sum of consecutive naturals, for example, 5057 + ... + 8375.

It is an arithmetic number, because the mean of its divisors is an integer number (1719760).

Almost surely, 2^22290404 is an apocalyptic number.

It is an amenable number.

22290404 is a deficient number, since it is larger than the sum of its proper divisors (18983836).

22290404 is a wasteful number, since it uses less digits than its factorization.

22290404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3419 (or 3417 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 22290404 is about 4721.2714389241. The cubic root of 22290404 is about 281.4314618919.

Adding to 22290404 its reverse (40409222), we get a palindrome (62699626).

The spelling of 22290404 in words is "twenty-two million, two hundred ninety thousand, four hundred four".