831406 has 8 divisors (see below), whose sum is σ = 1255824. Its totient is φ = 412800.

The previous prime is 831373. The next prime is 831407. The reversal of 831406 is 604138.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a pancake number, because a pancake can be divided into 831406 parts by 1289 straight cuts.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (831407) by changing a digit.

831406 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 1075 + ... + 1678.

It is an arithmetic number, because the mean of its divisors is an integer number (156978).

2⁸³¹⁴⁰⁶ is an apocalyptic number.

831406 is a deficient number, since it is larger than the sum of its proper divisors (424418).

831406 is a wasteful number, since it uses less digits than its factorization.

831406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 831406 is about 911.8146741526. The cubic root of 831406 is about 94.0309992825.

The spelling of 831406 in words is "eight hundred thirty-one thousand, four hundred six".