820734 has 16 divisors (see below), whose sum is σ = 1686288. Its totient is φ = 266112.

The previous prime is 820733. The next prime is 820747. The reversal of 820734 is 437028.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820733) 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, 1627 + ... + 2070.

It is an arithmetic number, because the mean of its divisors is an integer number (105393).

2⁸²⁰⁷³⁴ is an apocalyptic number.

820734 is an abundant number, since it is smaller than the sum of its proper divisors (865554).

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

820734 is a wasteful number, since it uses less digits than its factorization.

820734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3739.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 820734 is about 905.9437068604. The cubic root of 820734 is about 93.6269354141.

The spelling of 820734 in words is "eight hundred twenty thousand, seven hundred thirty-four".