349705642 has 32 divisors (see below), whose sum is σ = 617912064. Its totient is φ = 146337600.

The previous prime is 349705571. The next prime is 349705651. The reversal of 349705642 is 246507943.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 349705595 and 349705604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121848 + ... + 124684.

It is an arithmetic number, because the mean of its divisors is an integer number (19309752).

Almost surely, 2^349705642 is an apocalyptic number.

349705642 is a deficient number, since it is larger than the sum of its proper divisors (268206422).

349705642 is a wasteful number, since it uses less digits than its factorization.

349705642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3294.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 349705642 is about 18700.4182306172. The cubic root of 349705642 is about 704.5322531513.

The spelling of 349705642 in words is "three hundred forty-nine million, seven hundred five thousand, six hundred forty-two".