831620 has 24 divisors (see below), whose sum is σ = 1788864. Its totient is φ = 324576.

The previous prime is 831619. The next prime is 831631. The reversal of 831620 is 26138.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 831592 and 831601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377 + ... + 1343.

It is an arithmetic number, because the mean of its divisors is an integer number (74536).

2⁸³¹⁶²⁰ 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 831620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (894432).

831620 is an abundant number, since it is smaller than the sum of its proper divisors (957244).

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

831620 is a wasteful number, since it uses less digits than its factorization.

831620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019 (or 1017 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 831620 is about 911.9320150099. The cubic root of 831620 is about 94.0390663030.

Adding to 831620 its reverse (26138), we get a palindrome (857758).

The spelling of 831620 in words is "eight hundred thirty-one thousand, six hundred twenty".