22187140 has 24 divisors (see below), whose sum is σ = 47678400. Its totient is φ = 8668128.

The previous prime is 22187131. The next prime is 22187167. The reversal of 22187140 is 4178122.

It is a happy 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, 12040 + ... + 13759.

It is an arithmetic number, because the mean of its divisors is an integer number (1986600).

Almost surely, 2^22187140 is an apocalyptic number.

22187140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22187140 is an abundant number, since it is smaller than the sum of its proper divisors (25491260).

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

22187140 is a wasteful number, since it uses less digits than its factorization.

22187140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25851 (or 25849 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 22187140 is about 4710.3227065669. The cubic root of 22187140 is about 280.9961963830.

The spelling of 22187140 in words is "twenty-two million, one hundred eighty-seven thousand, one hundred forty".