349878 has 8 divisors (see below), whose sum is σ = 699768. Its totient is φ = 116624.

The previous prime is 349871. The next prime is 349903. The reversal of 349878 is 878943.

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

349878 is an admirable number.

It is a super-2 number, since 2×349878² = 244829229768, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349871) by changing a digit.

349878 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 29151 + ... + 29162.

It is an arithmetic number, because the mean of its divisors is an integer number (87471).

2³⁴⁹⁸⁷⁸ is an apocalyptic number.

349878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

349878 is a wasteful number, since it uses less digits than its factorization.

349878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58318.

The product of its digits is 48384, while the sum is 39.

The square root of 349878 is about 591.5048605041. The cubic root of 349878 is about 70.4647980791.

The spelling of 349878 in words is "three hundred forty-nine thousand, eight hundred seventy-eight".