831438 has 32 divisors (see below), whose sum is σ = 1879200. Its totient is φ = 272448.

The previous prime is 831437. The next prime is 831443. The reversal of 831438 is 834138.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 831438.

It is not an unprimeable number, because it can be changed into a prime (831431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4720 + ... + 4892.

It is an arithmetic number, because the mean of its divisors is an integer number (58725).

2⁸³¹⁴³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 831438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (939600).

831438 is an abundant number, since it is smaller than the sum of its proper divisors (1047762).

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

831438 is a wasteful number, since it uses less digits than its factorization.

831438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 267 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 831438 is about 911.8322214092. The cubic root of 831438 is about 94.0322056540.

It can be divided in two parts, 83 and 1438, that added together give a square (1521 = 39²).

The spelling of 831438 in words is "eight hundred thirty-one thousand, four hundred thirty-eight".