22981940 has 24 divisors (see below), whose sum is σ = 48693960. Its totient is φ = 9110528.

The previous prime is 22981939. The next prime is 22981957. The reversal of 22981940 is 4918922.

It can be written as a sum of positive squares in 4 ways, for example, as 1507984 + 21473956 = 1228^2 + 4634^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22981940.

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, 2825 + ... + 7344.

It is an arithmetic number, because the mean of its divisors is an integer number (2028915).

Almost surely, 2^22981940 is an apocalyptic number.

22981940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22981940 is an abundant number, since it is smaller than the sum of its proper divisors (25712020).

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

22981940 is a wasteful number, since it uses less digits than its factorization.

22981940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10291 (or 10289 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 22981940 is about 4793.9482683901. The cubic root of 22981940 is about 284.3122433670.

The spelling of 22981940 in words is "twenty-two million, nine hundred eighty-one thousand, nine hundred forty".