12769440 has 96 divisors (see below), whose sum is σ = 41368320. Its totient is φ = 3308544.

The previous prime is 12769433. The next prime is 12769441. The reversal of 12769440 is 4496721.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12769441) 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, 17401 + ... + 18119.

It is an arithmetic number, because the mean of its divisors is an integer number (430920).

Almost surely, 2^12769440 is an apocalyptic number.

12769440 is a gapful number since it is divisible by the number (10) 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 12769440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20684160).

12769440 is an abundant number, since it is smaller than the sum of its proper divisors (28598880).

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

12769440 is a wasteful number, since it uses less digits than its factorization.

12769440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774 (or 766 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 12769440 is about 3573.4353219276. The cubic root of 12769440 is about 233.7351082432.

The spelling of 12769440 in words is "twelve million, seven hundred sixty-nine thousand, four hundred forty".