349989320 has 16 divisors (see below), whose sum is σ = 787476060. Its totient is φ = 139995712.

The previous prime is 349989293. The next prime is 349989323. The reversal of 349989320 is 23989943.

It can be written as a sum of positive squares in 2 ways, for example, as 349017124 + 972196 = 18682^2 + 986^2 .

It is a super-2 number, since 2×349989320² = 244985048228124800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (349989323) 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, 4374827 + ... + 4374906.

Almost surely, 2^349989320 is an apocalyptic number.

It is an amenable number.

349989320 is an abundant number, since it is smaller than the sum of its proper divisors (437486740).

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

349989320 is a wasteful number, since it uses less digits than its factorization.

349989320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8749744 (or 8749740 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 47.

The square root of 349989320 is about 18708.0014966858. The cubic root of 349989320 is about 704.7227050240.

The spelling of 349989320 in words is "three hundred forty-nine million, nine hundred eighty-nine thousand, three hundred twenty".