349343839678 has 4 divisors (see below), whose sum is σ = 524015759520. Its totient is φ = 174671919838.

The previous prime is 349343839673. The next prime is 349343839697. The reversal of 349343839678 is 876938343943.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×349343839678² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349343839673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87335959918 + ... + 87335959921.

It is an arithmetic number, because the mean of its divisors is an integer number (131003939880).

Almost surely, 2^349343839678 is an apocalyptic number.

349343839678 is a deficient number, since it is larger than the sum of its proper divisors (174671919842).

349343839678 is a wasteful number, since it uses less digits than its factorization.

349343839678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174671919841.

The product of its digits is 282175488, while the sum is 67.

The spelling of 349343839678 in words is "three hundred forty-nine billion, three hundred forty-three million, eight hundred thirty-nine thousand, six hundred seventy-eight".