12863838 has 32 divisors (see below), whose sum is σ = 28054656. Its totient is φ = 3908448.

The previous prime is 12863819. The next prime is 12863839. The reversal of 12863838 is 83836821.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 12863796 and 12863805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12863839) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5481 + ... + 7467.

It is an arithmetic number, because the mean of its divisors is an integer number (876708).

Almost surely, 2^12863838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12863838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14027328).

12863838 is an abundant number, since it is smaller than the sum of its proper divisors (15190818).

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

12863838 is a wasteful number, since it uses less digits than its factorization.

12863838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088.

The product of its digits is 55296, while the sum is 39.

The square root of 12863838 is about 3586.6192995633. The cubic root of 12863838 is about 234.3096565218.

The spelling of 12863838 in words is "twelve million, eight hundred sixty-three thousand, eight hundred thirty-eight".