12281838 has 8 divisors (see below), whose sum is σ = 24563688. Its totient is φ = 4093944.

The previous prime is 12281831. The next prime is 12281881. The reversal of 12281838 is 83818221.

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

12281838 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 12281799 and 12281808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12281831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1023481 + ... + 1023492.

It is an arithmetic number, because the mean of its divisors is an integer number (3070461).

Almost surely, 2^12281838 is an apocalyptic number.

12281838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12281838 is a wasteful number, since it uses less digits than its factorization.

12281838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046978.

The product of its digits is 6144, while the sum is 33.

The square root of 12281838 is about 3504.5453342766. The cubic root of 12281838 is about 230.7213521355.

The spelling of 12281838 in words is "twelve million, two hundred eighty-one thousand, eight hundred thirty-eight".