22231890 has 48 divisors (see below), whose sum is σ = 58053528. Its totient is φ = 5902848.

The previous prime is 22231889. The next prime is 22231897. The reversal of 22231890 is 9813222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20711601 + 1520289 = 4551^2 + 1233^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22231897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29964 + ... + 30696.

Almost surely, 2^22231890 is an apocalyptic number.

22231890 is an abundant number, since it is smaller than the sum of its proper divisors (35821638).

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

22231890 is a wasteful number, since it uses less digits than its factorization.

22231890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083 (or 1080 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 22231890 is about 4715.0705190909. The cubic root of 22231890 is about 281.1849864542.

The spelling of 22231890 in words is "twenty-two million, two hundred thirty-one thousand, eight hundred ninety".