831036420 has 72 divisors (see below), whose sum is σ = 2531943960. Its totient is φ = 220631040.

The previous prime is 831036419. The next prime is 831036431. The reversal of 831036420 is 24630138.

It is a happy number.

831036420 is a `hidden beast` number, since 8 + 3 + 10 + 3 + 642 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 312016896 + 519019524 = 17664^2 + 22782^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31140 + ... + 51300.

Almost surely, 2^831036420 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 831036420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1265971980).

831036420 is an abundant number, since it is smaller than the sum of its proper divisors (1700907540).

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

831036420 is a wasteful number, since it uses less digits than its factorization.

831036420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20405 (or 20400 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 831036420 is about 28827.7023017791. The cubic root of 831036420 is about 940.1706420252.

Adding to 831036420 its reverse (24630138), we get a palindrome (855666558).

The spelling of 831036420 in words is "eight hundred thirty-one million, thirty-six thousand, four hundred twenty".