340857 has 18 divisors (see below), whose sum is σ = 542906. Its totient is φ = 205920.
The previous prime is 340849. The next prime is 340859. The reversal of 340857 is 758043.
It can be written as a sum of positive squares in only one way, i.e., 184041 + 156816 = 429^2 + 396^2 .
It is not a de Polignac number, because 340857 - 23 = 340849 is a prime.
It is an Ulam number.
It is a d-powerful number, because it can be written as 33 + 49 + 83 + 0 + 57 + 72 .
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 340857.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (340859) by changing a digit.
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 17 ways as a sum of consecutive naturals, for example, 933 + ... + 1245.
2340857 is an apocalyptic number.
It is an amenable number.
340857 is a deficient number, since it is larger than the sum of its proper divisors (202049).
340857 is a wasteful number, since it uses less digits than its factorization.
340857 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 341 (or 327 counting only the distinct ones).
The product of its (nonzero) digits is 3360, while the sum is 27.
The square root of 340857 is about 583.8295984275. The cubic root of 340857 is about 69.8539130219.
The spelling of 340857 in words is "three hundred forty thousand, eight hundred fifty-seven".
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