349940 has 12 divisors (see below), whose sum is σ = 734916. Its totient is φ = 139968.

The previous prime is 349939. The next prime is 349949. The reversal of 349940 is 49943.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40804 + 309136 = 202^2 + 556^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8729 + ... + 8768.

It is an arithmetic number, because the mean of its divisors is an integer number (61243).

2³⁴⁹⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

349940 is an abundant number, since it is smaller than the sum of its proper divisors (384976).

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

349940 is a wasteful number, since it uses less digits than its factorization.

349940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17506 (or 17504 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 349940 is about 591.5572668812. The cubic root of 349940 is about 70.4689600627.

The spelling of 349940 in words is "three hundred forty-nine thousand, nine hundred forty".