349686865 has 8 divisors (see below), whose sum is σ = 457771968. Its totient is φ = 254317680.

The previous prime is 349686859. The next prime is 349686937. The reversal of 349686865 is 568686943.

It is a happy number.

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

It is not a de Polignac number, because 349686865 - 2⁵ = 349686833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55), and also a Moran number because the ratio is a prime number: 6357943 = 349686865 / (3 + 4 + 9 + 6 + 8 + 6 + 8 + 6 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3178917 + ... + 3179026.

It is an arithmetic number, because the mean of its divisors is an integer number (57221496).

Almost surely, 2^349686865 is an apocalyptic number.

It is an amenable number.

349686865 is a deficient number, since it is larger than the sum of its proper divisors (108085103).

349686865 is a wasteful number, since it uses less digits than its factorization.

349686865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6357959.

The product of its digits is 7464960, while the sum is 55.

The square root of 349686865 is about 18699.9161762827. The cubic root of 349686865 is about 704.5196432710.

The spelling of 349686865 in words is "three hundred forty-nine million, six hundred eighty-six thousand, eight hundred sixty-five".