340306856 has 8 divisors (see below), whose sum is σ = 638075370. Its totient is φ = 170153424.

The previous prime is 340306849. The next prime is 340306903. The reversal of 340306856 is 658603043.

340306856 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 211120900 + 129185956 = 14530^2 + 11366^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21269171 + ... + 21269186.

Almost surely, 2^340306856 is an apocalyptic number.

It is an amenable number.

340306856 is a deficient number, since it is larger than the sum of its proper divisors (297768514).

340306856 is a wasteful number, since it uses less digits than its factorization.

340306856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42538363 (or 42538359 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 340306856 is about 18447.4078395855. The cubic root of 340306856 is about 698.1631132495.

Adding to 340306856 its reverse (658603043), we get a palindrome (998909899).

The spelling of 340306856 in words is "three hundred forty million, three hundred six thousand, eight hundred fifty-six".