22485640 has 32 divisors (see below), whose sum is σ = 51963480. Its totient is φ = 8750592.

The previous prime is 22485623. The next prime is 22485641. The reversal of 22485640 is 4658422.

It can be written as a sum of positive squares in 4 ways, for example, as 22297284 + 188356 = 4722^2 + 434^2 .

It is not an unprimeable number, because it can be changed into a prime (22485641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6117 + ... + 9076.

Almost surely, 2^22485640 is an apocalyptic number.

22485640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22485640 is an abundant number, since it is smaller than the sum of its proper divisors (29477840).

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

22485640 is a wasteful number, since it uses less digits than its factorization.

22485640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15241 (or 15237 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 22485640 is about 4741.9025717532. The cubic root of 22485640 is about 282.2507368722.

The spelling of 22485640 in words is "twenty-two million, four hundred eighty-five thousand, six hundred forty".