6881864 has 16 divisors (see below), whose sum is σ = 14076720. Its totient is φ = 3128080.

The previous prime is 6881851. The next prime is 6881869. The reversal of 6881864 is 4681886.

It is a super-2 number, since 2×6881864² = 94720104228992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6881869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39014 + ... + 39189.

It is an arithmetic number, because the mean of its divisors is an integer number (879795).

Almost surely, 2^6881864 is an apocalyptic number.

It is an amenable number.

6881864 is an abundant number, since it is smaller than the sum of its proper divisors (7194856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6881864 is a wasteful number, since it uses less digits than its factorization.

6881864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78220 (or 78216 counting only the distinct ones).

The product of its digits is 73728, while the sum is 41.

The square root of 6881864 is about 2623.3307073261. The cubic root of 6881864 is about 190.2108831187.

It can be divided in two parts, 688 and 1864, that added together give a palindrome (2552).

The spelling of 6881864 in words is "six million, eight hundred eighty-one thousand, eight hundred sixty-four".