22185240 has 192 divisors, whose sum is σ = 84706560. Its totient is φ = 4609920.

The previous prime is 22185227. The next prime is 22185253. The reversal of 22185240 is 4258122.

It is an interprime number because it is at equal distance from previous prime (22185227) and next prime (22185253).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22185240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2016835 + ... + 2016845.

It is an arithmetic number, because the mean of its divisors is an integer number (441180).

Almost surely, 2^22185240 is an apocalyptic number.

22185240 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 22185240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42353280).

22185240 is an abundant number, since it is smaller than the sum of its proper divisors (62521320).

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

22185240 is an equidigital number, since it uses as much as digits as its factorization.

22185240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 22185240 is about 4710.1210175536. The cubic root of 22185240 is about 280.9881750996.

The spelling of 22185240 in words is "twenty-two million, one hundred eighty-five thousand, two hundred forty".