22490840 has 16 divisors (see below), whose sum is σ = 50604480. Its totient is φ = 8996320.

The previous prime is 22490827. The next prime is 22490891. The reversal of 22490840 is 4809422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281096 + ... + 281175.

It is an arithmetic number, because the mean of its divisors is an integer number (3162780).

Almost surely, 2^22490840 is an apocalyptic number.

22490840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22490840 is an abundant number, since it is smaller than the sum of its proper divisors (28113640).

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

22490840 is a wasteful number, since it uses less digits than its factorization.

22490840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562282 (or 562278 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 22490840 is about 4742.4508431822. The cubic root of 22490840 is about 282.2724928419.

The spelling of 22490840 in words is "twenty-two million, four hundred ninety thousand, eight hundred forty".