340399566 has 24 divisors (see below), whose sum is σ = 794266200. Its totient is φ = 104738256.

The previous prime is 340399559. The next prime is 340399601. The reversal of 340399566 is 665993043.

It is a happy number.

340399566 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 727116 + ... + 727583.

It is an arithmetic number, because the mean of its divisors is an integer number (33094425).

Almost surely, 2^340399566 is an apocalyptic number.

340399566 is an abundant number, since it is smaller than the sum of its proper divisors (453866634).

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

340399566 is a wasteful number, since it uses less digits than its factorization.

340399566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454720 (or 1454717 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 45.

The square root of 340399566 is about 18449.9204876335. The cubic root of 340399566 is about 698.2265078243.

The spelling of 340399566 in words is "three hundred forty million, three hundred ninety-nine thousand, five hundred sixty-six".