863838 has 32 divisors (see below), whose sum is σ = 2034720. Its totient is φ = 270720.

The previous prime is 863833. The next prime is 863843. The reversal of 863838 is 838368.

It is an interprime number because it is at equal distance from previous prime (863833) and next prime (863843).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863833) 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, 448 + ... + 1388.

It is an arithmetic number, because the mean of its divisors is an integer number (63585).

2⁸⁶³⁸³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 863838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1017360).

863838 is an abundant number, since it is smaller than the sum of its proper divisors (1170882).

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

863838 is a wasteful number, since it uses less digits than its factorization.

863838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969 (or 963 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 863838 is about 929.4288568793. The cubic root of 863838 is about 95.2381099921.

The spelling of 863838 in words is "eight hundred sixty-three thousand, eight hundred thirty-eight".