340289 has 8 divisors (see below), whose sum is σ = 370728. Its totient is φ = 311040.

The previous prime is 340283. The next prime is 340297. The reversal of 340289 is 982043.

It can be written as a sum of positive squares in 4 ways, for example, as 146689 + 193600 = 383^2 + 440^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340289 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (340283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359 + ... + 899.

It is an arithmetic number, because the mean of its divisors is an integer number (46341).

2³⁴⁰²⁸⁹ is an apocalyptic number.

It is an amenable number.

340289 is a deficient number, since it is larger than the sum of its proper divisors (30439).

340289 is a wasteful number, since it uses less digits than its factorization.

340289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 340289 is about 583.3429523016. The cubic root of 340289 is about 69.8150902095.

The spelling of 340289 in words is "three hundred forty thousand, two hundred eighty-nine".