820234 has 4 divisors (see below), whose sum is σ = 1230354. Its totient is φ = 410116.

The previous prime is 820231. The next prime is 820241. The reversal of 820234 is 432028.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 804609 + 15625 = 897^2 + 125^2 .

It is not an unprimeable number, because it can be changed into a prime (820231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205057 + ... + 205060.

2⁸²⁰²³⁴ is an apocalyptic number.

820234 is a deficient number, since it is larger than the sum of its proper divisors (410120).

820234 is a wasteful number, since it uses less digits than its factorization.

820234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410119.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 820234 is about 905.6677094829. The cubic root of 820234 is about 93.6079187057.

The spelling of 820234 in words is "eight hundred twenty thousand, two hundred thirty-four".