6881994 has 48 divisors (see below), whose sum is σ = 17189952. Its totient is φ = 1949184.

The previous prime is 6881993. The next prime is 6881999. The reversal of 6881994 is 4991886.

6881994 = 197² + 198² + ... + 304².

It is a super-3 number, since 3×6881994³ (a number of 21 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (6881993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24177 + ... + 24459.

It is an arithmetic number, because the mean of its divisors is an integer number (358124).

Almost surely, 2^6881994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6881994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8594976).

6881994 is an abundant number, since it is smaller than the sum of its proper divisors (10307958).

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

6881994 is a wasteful number, since it uses less digits than its factorization.

6881994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 488 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 6881994 is about 2623.3554848705. The cubic root of 6881994 is about 190.2120808204.

It can be divided in two parts, 6881 and 994, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 6881994 in words is "six million, eight hundred eighty-one thousand, nine hundred ninety-four".