22585140 has 72 divisors (see below), whose sum is σ = 68909568. Its totient is φ = 5987520.

The previous prime is 22585111. The next prime is 22585151. The reversal of 22585140 is 4158522.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48549 + ... + 49011.

Almost surely, 2^22585140 is an apocalyptic number.

22585140 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 22585140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34454784).

22585140 is an abundant number, since it is smaller than the sum of its proper divisors (46324428).

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

22585140 is a wasteful number, since it uses less digits than its factorization.

22585140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749 (or 744 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 22585140 is about 4752.3825603585. The cubic root of 22585140 is about 282.6664484938. Note that the first 3 decimals are identical.

The spelling of 22585140 in words is "twenty-two million, five hundred eighty-five thousand, one hundred forty".