22205780 has 12 divisors (see below), whose sum is σ = 46632180. Its totient is φ = 8882304.

The previous prime is 22205779. The next prime is 22205789. The reversal of 22205780 is 8750222.

It can be written as a sum of positive squares in 2 ways, for example, as 3161284 + 19044496 = 1778^2 + 4364^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22205789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555125 + ... + 555164.

It is an arithmetic number, because the mean of its divisors is an integer number (3886015).

Almost surely, 2^22205780 is an apocalyptic number.

22205780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22205780 is an abundant number, since it is smaller than the sum of its proper divisors (24426400).

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

22205780 is a wasteful number, since it uses less digits than its factorization.

22205780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110298 (or 1110296 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 22205780 is about 4712.3009241771. The cubic root of 22205780 is about 281.0748651222.

It can be divided in two parts, 2220 and 5780, that added together give a cube (8000 = 20³).

The spelling of 22205780 in words is "twenty-two million, two hundred five thousand, seven hundred eighty".