349691856 has 20 divisors (see below), whose sum is σ = 903370752. Its totient is φ = 116563936.

The previous prime is 349691851. The next prime is 349691857. The reversal of 349691856 is 658196943.

It is a junction number, because it is equal to n+sod(n) for n = 349691799 and 349691808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349691851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3642576 + ... + 3642671.

Almost surely, 2^349691856 is an apocalyptic number.

It is an amenable number.

349691856 is an abundant number, since it is smaller than the sum of its proper divisors (553678896).

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

349691856 is a wasteful number, since it uses less digits than its factorization.

349691856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7285258 (or 7285252 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 51.

The square root of 349691856 is about 18700.0496256026. The cubic root of 349691856 is about 704.5229950705.

The spelling of 349691856 in words is "three hundred forty-nine million, six hundred ninety-one thousand, eight hundred fifty-six".