349949988 has 18 divisors (see below), whose sum is σ = 884595894. Its totient is φ = 116649984.

The previous prime is 349949909. The next prime is 349949993. The reversal of 349949988 is 889949943.

It can be written as a sum of positive squares in only one way, i.e., 330076224 + 19873764 = 18168^2 + 4458^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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 5 ways as a sum of consecutive naturals, for example, 4860381 + ... + 4860452.

Almost surely, 2^349949988 is an apocalyptic number.

It is an amenable number.

349949988 is an abundant number, since it is smaller than the sum of its proper divisors (534645906).

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

349949988 is a wasteful number, since it uses less digits than its factorization.

349949988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9720843 (or 9720838 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 63.

The square root of 349949988 is about 18706.9502591951. The cubic root of 349949988 is about 704.6963049881.

The spelling of 349949988 in words is "three hundred forty-nine million, nine hundred forty-nine thousand, nine hundred eighty-eight".