22170980 has 48 divisors (see below), whose sum is σ = 50485680. Its totient is φ = 8130048.

The previous prime is 22170979. The next prime is 22170989. The reversal of 22170980 is 8907122.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 11464996 + 10705984 = 3386^2 + 3272^2 .

It is not an unprimeable number, because it can be changed into a prime (22170989) 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 15 ways as a sum of consecutive naturals, for example, 69782 + ... + 70098.

It is an arithmetic number, because the mean of its divisors is an integer number (1051785).

Almost surely, 2^22170980 is an apocalyptic number.

22170980 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 22170980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25242840).

22170980 is an abundant number, since it is smaller than the sum of its proper divisors (28314700).

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

22170980 is a wasteful number, since it uses less digits than its factorization.

22170980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608 (or 606 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 22170980 is about 4708.6070126949. The cubic root of 22170980 is about 280.9279586346.

The spelling of 22170980 in words is "twenty-two million, one hundred seventy thousand, nine hundred eighty".