340830 has 48 divisors (see below), whose sum is σ = 1014624. Its totient is φ = 77760.

The previous prime is 340819. The next prime is 340849. The reversal of 340830 is 38043.

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

It is a congruent number.

It is an unprimeable number.

340830 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 23 ways as a sum of consecutive naturals, for example, 360 + ... + 900.

It is an arithmetic number, because the mean of its divisors is an integer number (21138).

2³⁴⁰⁸³⁰ is an apocalyptic number.

340830 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 340830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (507312).

340830 is an abundant number, since it is smaller than the sum of its proper divisors (673794).

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

340830 is a wasteful number, since it uses less digits than its factorization.

340830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561 (or 558 counting only the distinct ones).

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

The square root of 340830 is about 583.8064747842. The cubic root of 340830 is about 69.8520685481.

Adding to 340830 its reverse (38043), we get a palindrome (378873).

The spelling of 340830 in words is "three hundred forty thousand, eight hundred thirty".