340685 has 8 divisors (see below), whose sum is σ = 415896. Its totient is φ = 267840.

The previous prime is 340661. The next prime is 340687. The reversal of 340685 is 586043.

It can be written as a sum of positive squares in 4 ways, for example, as 23716 + 316969 = 154^2 + 563^2 .

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

It is not a de Polignac number, because 340685 - 2⁸ = 340429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254 + ... + 863.

It is an arithmetic number, because the mean of its divisors is an integer number (51987).

2³⁴⁰⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

340685 is a deficient number, since it is larger than the sum of its proper divisors (75211).

340685 is a wasteful number, since it uses less digits than its factorization.

340685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 340685 is about 583.6822765855. The cubic root of 340685 is about 69.8421613738.

The spelling of 340685 in words is "three hundred forty thousand, six hundred eighty-five".