22179798 has 64 divisors (see below), whose sum is σ = 53680320. Its totient is φ = 6759936.

The previous prime is 22179793. The next prime is 22179799. The reversal of 22179798 is 89797122.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22179791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33640 + ... + 34292.

It is an arithmetic number, because the mean of its divisors is an integer number (838755).

Almost surely, 2^22179798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22179798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26840160).

22179798 is an abundant number, since it is smaller than the sum of its proper divisors (31500522).

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

22179798 is a wasteful number, since it uses less digits than its factorization.

22179798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718 (or 712 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 22179798 is about 4709.5432899592. The cubic root of 22179798 is about 280.9651979205.

The spelling of 22179798 in words is "twenty-two million, one hundred seventy-nine thousand, seven hundred ninety-eight".