22090940 has 48 divisors (see below), whose sum is σ = 48190464. Its totient is φ = 8500800.

The previous prime is 22090933. The next prime is 22090951. The reversal of 22090940 is 4909022.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66575 + ... + 66905.

It is an arithmetic number, because the mean of its divisors is an integer number (1003968).

Almost surely, 2^22090940 is an apocalyptic number.

22090940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22090940 is an abundant number, since it is smaller than the sum of its proper divisors (26099524).

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

22090940 is a wasteful number, since it uses less digits than its factorization.

22090940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 22090940 is about 4700.0999989362. The cubic root of 22090940 is about 280.5894893583.

Adding to 22090940 its reverse (4909022), we get a palindrome (26999962).

The spelling of 22090940 in words is "twenty-two million, ninety thousand, nine hundred forty".