22280985 has 12 divisors (see below), whose sum is σ = 38620452. Its totient is φ = 11883168.

The previous prime is 22280983. The next prime is 22280989. The reversal of 22280985 is 58908222.

It can be written as a sum of positive squares in 2 ways, for example, as 14379264 + 7901721 = 3792^2 + 2811^2 .

It is not a de Polignac number, because 22280985 - 2¹ = 22280983 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (22280981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 247522 + ... + 247611.

It is an arithmetic number, because the mean of its divisors is an integer number (3218371).

Almost surely, 2^22280985 is an apocalyptic number.

It is an amenable number.

22280985 is a deficient number, since it is larger than the sum of its proper divisors (16339467).

22280985 is a wasteful number, since it uses less digits than its factorization.

22280985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495144 (or 495141 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 22280985 is about 4720.2738268028. The cubic root of 22280985 is about 281.3918158870.

The spelling of 22280985 in words is "twenty-two million, two hundred eighty thousand, nine hundred eighty-five".