820834 has 8 divisors (see below), whose sum is σ = 1407168. Its totient is φ = 351780.

The previous prime is 820793. The next prime is 820837. The reversal of 820834 is 438028.

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

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 820799 and 820808.

It is not an unprimeable number, because it can be changed into a prime (820837) 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, 29302 + ... + 29329.

It is an arithmetic number, because the mean of its divisors is an integer number (175896).

2⁸²⁰⁸³⁴ is an apocalyptic number.

820834 is a deficient number, since it is larger than the sum of its proper divisors (586334).

820834 is a wasteful number, since it uses less digits than its factorization.

820834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58640.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 820834 is about 905.9988962466. The cubic root of 820834 is about 93.6307378289.

The spelling of 820834 in words is "eight hundred twenty thousand, eight hundred thirty-four".