340385 has 8 divisors (see below), whose sum is σ = 430080. Its totient is φ = 257904.

The previous prime is 340381. The next prime is 340387. The reversal of 340385 is 583043.

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

It is a cyclic number.

It is not a de Polignac number, because 340385 - 2² = 340381 is a prime.

It is a d-powerful number, because it can be written as 3³ + 4⁹ + 3⁴ + 0 + 8 + 5⁷ .

It is a self number, because there is not a number n which added to its sum of digits gives 340385.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340385.

It is not an unprimeable number, because it can be changed into a prime (340381) 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, 1697 + ... + 1886.

It is an arithmetic number, because the mean of its divisors is an integer number (53760).

2³⁴⁰³⁸⁵ is an apocalyptic number.

It is an amenable number.

340385 is a deficient number, since it is larger than the sum of its proper divisors (89695).

340385 is a wasteful number, since it uses less digits than its factorization.

340385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3607.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 340385 is about 583.4252308565. The cubic root of 340385 is about 69.8216548438.

It can be divided in two parts, 34038 and 5, that added together give a palindrome (34043).

The spelling of 340385 in words is "three hundred forty thousand, three hundred eighty-five".