819234 has 40 divisors (see below), whose sum is σ = 1981980. Its totient is φ = 251424.

The previous prime is 819229. The next prime is 819239. The reversal of 819234 is 432918.

It is an interprime number because it is at equal distance from previous prime (819229) and next prime (819239).

It can be written as a sum of positive squares in 2 ways, for example, as 731025 + 88209 = 855^2 + 297^2 .

It is a super-2 number, since 2×819234² = 1342288693512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 819198 and 819207.

It is not an unprimeable number, because it can be changed into a prime (819239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1912 + ... + 2300.

2⁸¹⁹²³⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 819234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (990990).

819234 is an abundant number, since it is smaller than the sum of its proper divisors (1162746).

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

819234 is a wasteful number, since it uses less digits than its factorization.

819234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416 (or 407 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 819234 is about 905.1154622478. The cubic root of 819234 is about 93.5698620919.

The spelling of 819234 in words is "eight hundred nineteen thousand, two hundred thirty-four".