6881439 has 32 divisors (see below), whose sum is σ = 10483200. Its totient is φ = 3991680.

The previous prime is 6881437. The next prime is 6881443. The reversal of 6881439 is 9341886.

It is not a de Polignac number, because 6881439 - 2¹ = 6881437 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 6⁴ + 8 + 8⁷ + 1 + 4 + 3¹⁴ + 9 .

It is a junction number, because it is equal to n+sod(n) for n = 6881397 and 6881406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6881437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37929 + ... + 38109.

It is an arithmetic number, because the mean of its divisors is an integer number (327600).

Almost surely, 2^6881439 is an apocalyptic number.

6881439 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

6881439 is a deficient number, since it is larger than the sum of its proper divisors (3601761).

6881439 is a wasteful number, since it uses less digits than its factorization.

6881439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255.

The product of its digits is 41472, while the sum is 39.

The square root of 6881439 is about 2623.2497021824. The cubic root of 6881439 is about 190.2069674505.

The spelling of 6881439 in words is "six million, eight hundred eighty-one thousand, four hundred thirty-nine".