831220834 has 16 divisors (see below), whose sum is σ = 1257480000. Its totient is φ = 412069104.

The previous prime is 831220781. The next prime is 831220837. The reversal of 831220834 is 438022138.

It is a junction number, because it is equal to n+sod(n) for n = 831220796 and 831220805.

It is not an unprimeable number, because it can be changed into a prime (831220837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275667 + ... + 278665.

It is an arithmetic number, because the mean of its divisors is an integer number (78592500).

Almost surely, 2^831220834 is an apocalyptic number.

831220834 is a deficient number, since it is larger than the sum of its proper divisors (426259166).

831220834 is a wasteful number, since it uses less digits than its factorization.

831220834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4137.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 831220834 is about 28830.9006796527. The cubic root of 831220834 is about 940.2401808168.

The spelling of 831220834 in words is "eight hundred thirty-one million, two hundred twenty thousand, eight hundred thirty-four".