22033890 has 64 divisors (see below), whose sum is σ = 59558400. Its totient is φ = 5795712.

The previous prime is 22033883. The next prime is 22033903. The reversal of 22033890 is 9833022.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 20814 + ... + 21846.

It is an arithmetic number, because the mean of its divisors is an integer number (930600).

Almost surely, 2^22033890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22033890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29779200).

22033890 is an abundant number, since it is smaller than the sum of its proper divisors (37524510).

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

22033890 is a wasteful number, since it uses less digits than its factorization.

22033890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128 (or 1122 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 22033890 is about 4694.0270557380. The cubic root of 22033890 is about 280.3477397224.

The spelling of 22033890 in words is "twenty-two million, thirty-three thousand, eight hundred ninety".