22185860 has 24 divisors (see below), whose sum is σ = 47022360. Its totient is φ = 8792064.

The previous prime is 22185851. The next prime is 22185907. The reversal of 22185860 is 6858122.

It can be written as a sum of positive squares in 4 ways, for example, as 5161984 + 17023876 = 2272^2 + 4126^2 .

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, 2909 + ... + 7268.

It is an arithmetic number, because the mean of its divisors is an integer number (1959265).

Almost surely, 2^22185860 is an apocalyptic number.

22185860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22185860 is an abundant number, since it is smaller than the sum of its proper divisors (24836500).

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

22185860 is a wasteful number, since it uses less digits than its factorization.

22185860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10295 (or 10293 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 22185860 is about 4710.1868328125. The cubic root of 22185860 is about 280.9907926214.

The spelling of 22185860 in words is "twenty-two million, one hundred eighty-five thousand, eight hundred sixty".