349689142 has 16 divisors (see below), whose sum is σ = 572792400. Its totient is φ = 158790240.

The previous prime is 349689127. The next prime is 349689203. The reversal of 349689142 is 241986943.

It is a junction number, because it is equal to n+sod(n) for n = 349689092 and 349689101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16084 + ... + 30952.

It is an arithmetic number, because the mean of its divisors is an integer number (35799525).

Almost surely, 2^349689142 is an apocalyptic number.

349689142 is a deficient number, since it is larger than the sum of its proper divisors (223103258).

349689142 is a wasteful number, since it uses less digits than its factorization.

349689142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15951.

The product of its digits is 373248, while the sum is 46.

The square root of 349689142 is about 18699.9770588095. The cubic root of 349689142 is about 704.5211724369.

The spelling of 349689142 in words is "three hundred forty-nine million, six hundred eighty-nine thousand, one hundred forty-two".