22505860 has 24 divisors (see below), whose sum is σ = 50898456. Its totient is φ = 8309760.

The previous prime is 22505837. The next prime is 22505869. The reversal of 22505860 is 6850522.

It can be written as a sum of positive squares in 4 ways, for example, as 324 + 22505536 = 18^2 + 4744^2 .

It is not an unprimeable number, because it can be changed into a prime (22505869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43021 + ... + 43540.

It is an arithmetic number, because the mean of its divisors is an integer number (2120769).

Almost surely, 2^22505860 is an apocalyptic number.

22505860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22505860 is an abundant number, since it is smaller than the sum of its proper divisors (28392596).

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

22505860 is a wasteful number, since it uses less digits than its factorization.

22505860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86583 (or 86581 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 22505860 is about 4744.0341482751. The cubic root of 22505860 is about 282.3353152975.

The spelling of 22505860 in words is "twenty-two million, five hundred five thousand, eight hundred sixty".