22179990 has 32 divisors (see below), whose sum is σ = 60837120. Its totient is φ = 5069664.

The previous prime is 22179977. The next prime is 22180009. The reversal of 22179990 is 9997122.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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, 52600 + ... + 53019.

It is an arithmetic number, because the mean of its divisors is an integer number (1901160).

Almost surely, 2^22179990 is an apocalyptic number.

22179990 is an abundant number, since it is smaller than the sum of its proper divisors (38657130).

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

22179990 is a wasteful number, since it uses less digits than its factorization.

22179990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105636.

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 22179990 is about 4709.5636740573. The cubic root of 22179990 is about 280.9660086457.

The spelling of 22179990 in words is "twenty-two million, one hundred seventy-nine thousand, nine hundred ninety".