22043140 has 72 divisors (see below), whose sum is σ = 54698112. Its totient is φ = 7439040.

The previous prime is 22043137. The next prime is 22043159. The reversal of 22043140 is 4134022.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81205 + ... + 81475.

It is an arithmetic number, because the mean of its divisors is an integer number (759696).

Almost surely, 2^22043140 is an apocalyptic number.

22043140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22043140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27349056).

22043140 is an abundant number, since it is smaller than the sum of its proper divisors (32654972).

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

22043140 is a wasteful number, since it uses less digits than its factorization.

22043140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 22043140 is about 4695.0122470554. The cubic root of 22043140 is about 280.3869649612.

Adding to 22043140 its reverse (4134022), we get a palindrome (26177162).

The spelling of 22043140 in words is "twenty-two million, forty-three thousand, one hundred forty".