349660820 has 24 divisors (see below), whose sum is σ = 734680800. Its totient is φ = 139789472.

The previous prime is 349660799. The next prime is 349660891. The reversal of 349660820 is 28066943.

It is a congruent 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, 48191 + ... + 54969.

It is an arithmetic number, because the mean of its divisors is an integer number (30611700).

Almost surely, 2^349660820 is an apocalyptic number.

It is an amenable number.

349660820 is an abundant number, since it is smaller than the sum of its proper divisors (385019980).

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

349660820 is a wasteful number, since it uses less digits than its factorization.

349660820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9367 (or 9365 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 349660820 is about 18699.2197698193. The cubic root of 349660820 is about 704.5021517459.

The spelling of 349660820 in words is "three hundred forty-nine million, six hundred sixty thousand, eight hundred twenty".