12911444 has 48 divisors (see below), whose sum is σ = 28224000. Its totient is φ = 5031936.

The previous prime is 12911413. The next prime is 12911447. The reversal of 12911444 is 44411921.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12911447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28532 + ... + 28980.

It is an arithmetic number, because the mean of its divisors is an integer number (588000).

Almost surely, 2^12911444 is an apocalyptic number.

12911444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12911444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14112000).

12911444 is an abundant number, since it is smaller than the sum of its proper divisors (15312556).

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

12911444 is a wasteful number, since it uses less digits than its factorization.

12911444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552 (or 550 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 12911444 is about 3593.2497825784. The cubic root of 12911444 is about 234.5983421024.

The spelling of 12911444 in words is "twelve million, nine hundred eleven thousand, four hundred forty-four".