840330 has 24 divisors (see below), whose sum is σ = 2185092. Its totient is φ = 224064.

The previous prime is 840319. The next prime is 840331. The reversal of 840330 is 33048.

It can be written as a sum of positive squares in 2 ways, for example, as 804609 + 35721 = 897^2 + 189^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 840330.

It is not an unprimeable number, because it can be changed into a prime (840331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4579 + ... + 4758.

2⁸⁴⁰³³⁰ is an apocalyptic number.

840330 is an abundant number, since it is smaller than the sum of its proper divisors (1344762).

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

840330 is a wasteful number, since it uses less digits than its factorization.

840330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9350 (or 9347 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 840330 is about 916.6951510726. The cubic root of 840330 is about 94.3662338538.

Adding to 840330 its reverse (33048), we get a palindrome (873378).

The spelling of 840330 in words is "eight hundred forty thousand, three hundred thirty".