22456660 has 36 divisors (see below), whose sum is σ = 50128092. Its totient is φ = 8421376.

The previous prime is 22456649. The next prime is 22456691. The reversal of 22456660 is 6665422.

It can be written as a sum of positive squares in 6 ways, for example, as 10150596 + 12306064 = 3186^2 + 3508^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87252 + ... + 87508.

It is an arithmetic number, because the mean of its divisors is an integer number (1392447).

Almost surely, 2^22456660 is an apocalyptic number.

22456660 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 22456660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25064046).

22456660 is an abundant number, since it is smaller than the sum of its proper divisors (27671432).

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

22456660 is a wasteful number, since it uses less digits than its factorization.

22456660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 22456660 is about 4738.8458510485. The cubic root of 22456660 is about 282.1294277033.

The spelling of 22456660 in words is "twenty-two million, four hundred fifty-six thousand, six hundred sixty".