12281868 has 30 divisors (see below), whose sum is σ = 32108076. Its totient is φ = 4093848.

The previous prime is 12281831. The next prime is 12281881. The reversal of 12281868 is 86818221.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 9 ways as a sum of consecutive naturals, for example, 18630 + ... + 19277.

Almost surely, 2^12281868 is an apocalyptic number.

12281868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12281868 is an abundant number, since it is smaller than the sum of its proper divisors (19826208).

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

12281868 is a wasteful number, since it uses less digits than its factorization.

12281868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37923 (or 37912 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 12281868 is about 3504.5496144298. The cubic root of 12281868 is about 230.7215399911.

The spelling of 12281868 in words is "twelve million, two hundred eighty-one thousand, eight hundred sixty-eight".