22243940 has 12 divisors (see below), whose sum is σ = 46712316. Its totient is φ = 8897568.

The previous prime is 22243891. The next prime is 22243987. The reversal of 22243940 is 4934222.

It can be written as a sum of positive squares in 2 ways, for example, as 3356224 + 18887716 = 1832^2 + 4346^2 .

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, 556079 + ... + 556118.

It is an arithmetic number, because the mean of its divisors is an integer number (3892693).

Almost surely, 2^22243940 is an apocalyptic number.

22243940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22243940 is an abundant number, since it is smaller than the sum of its proper divisors (24468376).

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

22243940 is a wasteful number, since it uses less digits than its factorization.

22243940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112206 (or 1112204 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 22243940 is about 4716.3481635689. The cubic root of 22243940 is about 281.2357793633.

The spelling of 22243940 in words is "twenty-two million, two hundred forty-three thousand, nine hundred forty".