343400646 has 16 divisors (see below), whose sum is σ = 727201584. Its totient is φ = 107733504.

The previous prime is 343400627. The next prime is 343400657. The reversal of 343400646 is 646004343.

It is a Curzon number.

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, 1683235 + ... + 1683438.

It is an arithmetic number, because the mean of its divisors is an integer number (45450099).

Almost surely, 2^343400646 is an apocalyptic number.

343400646 is an abundant number, since it is smaller than the sum of its proper divisors (383800938).

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

343400646 is a wasteful number, since it uses less digits than its factorization.

343400646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3366695.

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 343400646 is about 18531.0724460297. The cubic root of 343400646 is about 700.2724422502.

Adding to 343400646 its reverse (646004343), we get a palindrome (989404989).

The spelling of 343400646 in words is "three hundred forty-three million, four hundred thousand, six hundred forty-six".