12817944 has 48 divisors (see below), whose sum is σ = 35380800. Its totient is φ = 4190784.

The previous prime is 12817943. The next prime is 12817967. The reversal of 12817944 is 44971821.

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

It is a junction number, because it is equal to n+sod(n) for n = 12817899 and 12817908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12817943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2137 + ... + 5495.

It is an arithmetic number, because the mean of its divisors is an integer number (737100).

Almost surely, 2^12817944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12817944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17690400).

12817944 is an abundant number, since it is smaller than the sum of its proper divisors (22562856).

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

12817944 is a wasteful number, since it uses less digits than its factorization.

12817944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3424 (or 3417 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 12817944 is about 3580.2156359638. The cubic root of 12817944 is about 234.0306775471.

The spelling of 12817944 in words is "twelve million, eight hundred seventeen thousand, nine hundred forty-four".