6438831 has 16 divisors (see below), whose sum is σ = 9849600. Its totient is φ = 3665088.

The previous prime is 6438829. The next prime is 6438833. The reversal of 6438831 is 1388346.

It is an interprime number because it is at equal distance from previous prime (6438829) and next prime (6438833).

It is not a de Polignac number, because 6438831 - 2¹ = 6438829 is a prime.

It is a super-2 number, since 2×6438831² = 82917089293122, which contains 22 as substring.

6438831 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6438792 and 6438801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6438833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7555 + ... + 8363.

It is an arithmetic number, because the mean of its divisors is an integer number (615600).

Almost surely, 2^6438831 is an apocalyptic number.

6438831 is a deficient number, since it is larger than the sum of its proper divisors (3410769).

6438831 is a wasteful number, since it uses less digits than its factorization.

6438831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198.

The product of its digits is 13824, while the sum is 33.

The square root of 6438831 is about 2537.4851723705. The cubic root of 6438831 is about 186.0382913419.

The spelling of 6438831 in words is "six million, four hundred thirty-eight thousand, eight hundred thirty-one".