340820 has 12 divisors (see below), whose sum is σ = 715764. Its totient is φ = 136320.

The previous prime is 340819. The next prime is 340849. The reversal of 340820 is 28043.

It can be written as a sum of positive squares in 2 ways, for example, as 226576 + 114244 = 476^2 + 338^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340820.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8501 + ... + 8540.

It is an arithmetic number, because the mean of its divisors is an integer number (59647).

2³⁴⁰⁸²⁰ is an apocalyptic number.

It is an amenable number.

340820 is an abundant number, since it is smaller than the sum of its proper divisors (374944).

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

340820 is a wasteful number, since it uses less digits than its factorization.

340820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17050 (or 17048 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 340820 is about 583.7979102395. The cubic root of 340820 is about 69.8513853849.

Adding to 340820 its reverse (28043), we get a palindrome (368863).

The spelling of 340820 in words is "three hundred forty thousand, eight hundred twenty".