343990 has 16 divisors (see below), whose sum is σ = 635040. Its totient is φ = 134080.

The previous prime is 343963. The next prime is 343997. The reversal of 343990 is 99343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343997) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10 + ... + 829.

It is an arithmetic number, because the mean of its divisors is an integer number (39690).

2³⁴³⁹⁹⁰ is an apocalyptic number.

343990 is a deficient number, since it is larger than the sum of its proper divisors (291050).

343990 is a wasteful number, since it uses less digits than its factorization.

343990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 343990 is about 586.5066069534. The cubic root of 343990 is about 70.0672822480.

The spelling of 343990 in words is "three hundred forty-three thousand, nine hundred ninety".