6856239 has 32 divisors (see below), whose sum is σ = 10450944. Its totient is φ = 3968640.

The previous prime is 6856229. The next prime is 6856243. The reversal of 6856239 is 9326586.

It is not a de Polignac number, because 6856239 - 2⁷ = 6856111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a d-powerful number, because it can be written as 6 + 8⁷ + 5⁹ + 6³ + 2²¹ + 3¹¹ + 9⁶ .

It is a junction number, because it is equal to n+sod(n) for n = 6856197 and 6856206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6856229) 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 31 ways as a sum of consecutive naturals, for example, 64024 + ... + 64130.

It is an arithmetic number, because the mean of its divisors is an integer number (326592).

Almost surely, 2^6856239 is an apocalyptic number.

6856239 is a deficient number, since it is larger than the sum of its proper divisors (3594705).

6856239 is a wasteful number, since it uses less digits than its factorization.

6856239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207.

The product of its digits is 77760, while the sum is 39.

The square root of 6856239 is about 2618.4420940704. The cubic root of 6856239 is about 189.9745025803.

The spelling of 6856239 in words is "six million, eight hundred fifty-six thousand, two hundred thirty-nine".