22490940 has 24 divisors (see below), whose sum is σ = 62974800. Its totient is φ = 5997568.

The previous prime is 22490939. The next prime is 22490953. The reversal of 22490940 is 4909422.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 22490898 and 22490907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187365 + ... + 187484.

It is an arithmetic number, because the mean of its divisors is an integer number (2623950).

Almost surely, 2^22490940 is an apocalyptic number.

22490940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22490940 is an abundant number, since it is smaller than the sum of its proper divisors (40483860).

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

22490940 is a wasteful number, since it uses less digits than its factorization.

22490940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374861 (or 374859 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 22490940 is about 4742.4613862424. The cubic root of 22490940 is about 282.2729111931.

It can be divided in two parts, 2 and 2490940, that added together give a palindrome (2490942).

The spelling of 22490940 in words is "twenty-two million, four hundred ninety thousand, nine hundred forty".