6391306 has 8 divisors (see below), whose sum is σ = 9846180. Its totient is φ = 3109248.

The previous prime is 6391289. The next prime is 6391321. The reversal of 6391306 is 6031936.

It can be written as a sum of positive squares in 2 ways, for example, as 6275025 + 116281 = 2505^2 + 341^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43111 + ... + 43258.

Almost surely, 2^6391306 is an apocalyptic number.

6391306 is a deficient number, since it is larger than the sum of its proper divisors (3454874).

6391306 is a wasteful number, since it uses less digits than its factorization.

6391306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86408.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 6391306 is about 2528.1032415627. The cubic root of 6391306 is about 185.5794444697.

The spelling of 6391306 in words is "six million, three hundred ninety-one thousand, three hundred six".