12281944 has 8 divisors (see below), whose sum is σ = 23028660. Its totient is φ = 6140968.

The previous prime is 12281909. The next prime is 12281947. The reversal of 12281944 is 44918221.

12281944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×12281944² = 301692296838272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12281947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 767614 + ... + 767629.

Almost surely, 2^12281944 is an apocalyptic number.

It is an amenable number.

12281944 is a deficient number, since it is larger than the sum of its proper divisors (10746716).

12281944 is a wasteful number, since it uses less digits than its factorization.

12281944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535249 (or 1535245 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 12281944 is about 3504.5604574611. The cubic root of 12281944 is about 230.7220158905.

It can be divided in two parts, 12281 and 944, that added together give a square (13225 = 115²).

The spelling of 12281944 in words is "twelve million, two hundred eighty-one thousand, nine hundred forty-four".