22144940 has 24 divisors (see below), whose sum is σ = 46675440. Its totient is φ = 8825408.

The previous prime is 22144939. The next prime is 22144963. The reversal of 22144940 is 4944122.

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, 3971 + ... + 7749.

It is an arithmetic number, because the mean of its divisors is an integer number (1944810).

Almost surely, 2^22144940 is an apocalyptic number.

22144940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22144940 is an abundant number, since it is smaller than the sum of its proper divisors (24530500).

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

22144940 is a wasteful number, since it uses less digits than its factorization.

22144940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4081 (or 4079 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 22144940 is about 4705.8410512893. The cubic root of 22144940 is about 280.8179314745.

The spelling of 22144940 in words is "twenty-two million, one hundred forty-four thousand, nine hundred forty".