22806140 has 24 divisors (see below), whose sum is σ = 54735072. Its totient is φ = 7819200.

The previous prime is 22806107. The next prime is 22806143. The reversal of 22806140 is 4160822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22806143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81311 + ... + 81590.

It is an arithmetic number, because the mean of its divisors is an integer number (2280628).

Almost surely, 2^22806140 is an apocalyptic number.

22806140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22806140 is an abundant number, since it is smaller than the sum of its proper divisors (31928932).

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

22806140 is a wasteful number, since it uses less digits than its factorization.

22806140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162917 (or 162915 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 22806140 is about 4775.5774519947. The cubic root of 22806140 is about 283.5854395880.

Adding to 22806140 its reverse (4160822), we get a palindrome (26966962).

The spelling of 22806140 in words is "twenty-two million, eight hundred six thousand, one hundred forty".