340390686 has 32 divisors (see below), whose sum is σ = 694389888. Its totient is φ = 111212640.

The previous prime is 340390679. The next prime is 340390703. The reversal of 340390686 is 686093043.

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 15 ways as a sum of consecutive naturals, for example, 82816 + ... + 86828.

It is an arithmetic number, because the mean of its divisors is an integer number (21699684).

Almost surely, 2^340390686 is an apocalyptic number.

340390686 is an abundant number, since it is smaller than the sum of its proper divisors (353999202).

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

340390686 is a wasteful number, since it uses less digits than its factorization.

340390686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4296.

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 340390686 is about 18449.6798346204. The cubic root of 340390686 is about 698.2204362289.

The spelling of 340390686 in words is "three hundred forty million, three hundred ninety thousand, six hundred eighty-six".