22842890 has 32 divisors (see below), whose sum is σ = 48090240. Its totient is φ = 7648704.

The previous prime is 22842889. The next prime is 22842899. The reversal of 22842890 is 9824822.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22842890.

It is not an unprimeable number, because it can be changed into a prime (22842899) by changing a digit.

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, 785 + ... + 6804.

It is an arithmetic number, because the mean of its divisors is an integer number (1502820).

Almost surely, 2^22842890 is an apocalyptic number.

22842890 is an abundant number, since it is smaller than the sum of its proper divisors (25247350).

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

22842890 is a wasteful number, since it uses less digits than its factorization.

22842890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7646.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 22842890 is about 4779.4236054152. The cubic root of 22842890 is about 283.7376818059.

It can be divided in two parts, 22842 and 890, that added together give a palindrome (23732).

The spelling of 22842890 in words is "twenty-two million, eight hundred forty-two thousand, eight hundred ninety".