22169890 has 8 divisors (see below), whose sum is σ = 39905820. Its totient is φ = 8867952.

The previous prime is 22169869. The next prime is 22169893. The reversal of 22169890 is 9896122.

It can be written as a sum of positive squares in 2 ways, for example, as 21818241 + 351649 = 4671^2 + 593^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×22169890² = 983008045224200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22169893) 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, 1108485 + ... + 1108504.

Almost surely, 2^22169890 is an apocalyptic number.

22169890 is a deficient number, since it is larger than the sum of its proper divisors (17735930).

22169890 is a wasteful number, since it uses less digits than its factorization.

22169890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216996.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 22169890 is about 4708.4912657878. The cubic root of 22169890 is about 280.9233547711.

The spelling of 22169890 in words is "twenty-two million, one hundred sixty-nine thousand, eight hundred ninety".