340306857 has 12 divisors (see below), whose sum is σ = 536241264. Its totient is φ = 206246520.

The previous prime is 340306849. The next prime is 340306903. The reversal of 340306857 is 758603043.

It is a happy number.

340306857 is a `hidden beast` number, since 340 + 306 + 8 + 5 + 7 = 666.

It is not a de Polignac number, because 340306857 - 2³ = 340306849 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (340306457) 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 11 ways as a sum of consecutive naturals, for example, 1718623 + ... + 1718820.

It is an arithmetic number, because the mean of its divisors is an integer number (44686772).

Almost surely, 2^340306857 is an apocalyptic number.

It is an amenable number.

340306857 is a deficient number, since it is larger than the sum of its proper divisors (195934407).

340306857 is a wasteful number, since it uses less digits than its factorization.

340306857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3437460 (or 3437457 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 340306857 is about 18447.4078666896. The cubic root of 340306857 is about 698.1631139334.

The spelling of 340306857 in words is "three hundred forty million, three hundred six thousand, eight hundred fifty-seven".