12891822 has 16 divisors (see below), whose sum is σ = 26904960. Its totient is φ = 4110392.

The previous prime is 12891811. The next prime is 12891829. The reversal of 12891822 is 22819821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12891829) 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 7 ways as a sum of consecutive naturals, for example, 46572 + ... + 46847.

It is an arithmetic number, because the mean of its divisors is an integer number (1681560).

Almost surely, 2^12891822 is an apocalyptic number.

12891822 is an abundant number, since it is smaller than the sum of its proper divisors (14013138).

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

12891822 is a wasteful number, since it uses less digits than its factorization.

12891822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93447.

The product of its digits is 4608, while the sum is 33.

The square root of 12891822 is about 3590.5183469800. The cubic root of 12891822 is about 234.4794392497.

The spelling of 12891822 in words is "twelve million, eight hundred ninety-one thousand, eight hundred twenty-two".