349857 has 6 divisors (see below), whose sum is σ = 505362. Its totient is φ = 233232.

The previous prime is 349849. The next prime is 349871. The reversal of 349857 is 758943.

It can be written as a sum of positive squares in only one way, i.e., 349281 + 576 = 591^2 + 24^2 .

It is not a de Polignac number, because 349857 - 2³ = 349849 is a prime.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (349837) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19428 + ... + 19445.

It is an arithmetic number, because the mean of its divisors is an integer number (84227).

2³⁴⁹⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

349857 is a deficient number, since it is larger than the sum of its proper divisors (155505).

349857 is a wasteful number, since it uses less digits than its factorization.

349857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38879 (or 38876 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 349857 is about 591.4871089043. The cubic root of 349857 is about 70.4633882635.

The spelling of 349857 in words is "three hundred forty-nine thousand, eight hundred fifty-seven".