831616 has 32 divisors (see below), whose sum is σ = 1698300. Its totient is φ = 405504.

The previous prime is 831599. The next prime is 831617. The reversal of 831616 is 616138.

831616 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in 2 ways, for example, as 817216 + 14400 = 904^2 + 120^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a zygodrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (831617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9300 + ... + 9388.

2⁸³¹⁶¹⁶ 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 831616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (849150).

831616 is an abundant number, since it is smaller than the sum of its proper divisors (866684).

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

831616 is an equidigital number, since it uses as much as digits as its factorization.

831616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 164 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 831616 is about 911.9298218613. The cubic root of 831616 is about 94.0389155302.

The spelling of 831616 in words is "eight hundred thirty-one thousand, six hundred sixteen".