22290426 has 48 divisors (see below), whose sum is σ = 51068160. Its totient is φ = 7015680.

The previous prime is 22290419. The next prime is 22290449. The reversal of 22290426 is 62409222.

It is a super-2 number, since 2×22290426² = 993726182522952, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22290426.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23530 + ... + 24458.

It is an arithmetic number, because the mean of its divisors is an integer number (1063920).

Almost surely, 2^22290426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22290426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25534080).

22290426 is an abundant number, since it is smaller than the sum of its proper divisors (28777734).

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

22290426 is a wasteful number, since it uses less digits than its factorization.

22290426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011 (or 1008 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 22290426 is about 4721.2737688043. The cubic root of 22290426 is about 281.4315544802.

Adding to 22290426 its reverse (62409222), we get a palindrome (84699648).

The spelling of 22290426 in words is "twenty-two million, two hundred ninety thousand, four hundred twenty-six".