830840 has 16 divisors (see below), whose sum is σ = 1869480. Its totient is φ = 332320.

The previous prime is 830839. The next prime is 830849. The reversal of 830840 is 48038.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (830849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10346 + ... + 10425.

2⁸³⁰⁸⁴⁰ is an apocalyptic number.

It is an amenable number.

830840 is an abundant number, since it is smaller than the sum of its proper divisors (1038640).

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

830840 is a wasteful number, since it uses less digits than its factorization.

830840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20782 (or 20778 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 830840 is about 911.5042512243. The cubic root of 830840 is about 94.0096564699.

Adding to 830840 its reverse (48038), we get a palindrome (878878).

The spelling of 830840 in words is "eight hundred thirty thousand, eight hundred forty".