22028140 has 12 divisors (see below), whose sum is σ = 46259136. Its totient is φ = 8811248.

The previous prime is 22028131. The next prime is 22028161. The reversal of 22028140 is 4182022.

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, 550684 + ... + 550723.

It is an arithmetic number, because the mean of its divisors is an integer number (3854928).

Almost surely, 2^22028140 is an apocalyptic number.

22028140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22028140 is an abundant number, since it is smaller than the sum of its proper divisors (24230996).

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

22028140 is a wasteful number, since it uses less digits than its factorization.

22028140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101416 (or 1101414 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 22028140 is about 4693.4145352824. The cubic root of 22028140 is about 280.3233509324.

The spelling of 22028140 in words is "twenty-two million, twenty-eight thousand, one hundred forty".