6988881 has 8 divisors (see below), whose sum is σ = 9368064. Its totient is φ = 4634480.

The previous prime is 6988879. The next prime is 6988907. The reversal of 6988881 is 1888896.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6988881 - 2¹ = 6988879 is a prime.

It is a super-2 number, since 2×6988881² = 97688915264322, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6988881.

It is not an unprimeable number, because it can be changed into a prime (6988811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5526 + ... + 6671.

It is an arithmetic number, because the mean of its divisors is an integer number (1171008).

Almost surely, 2^6988881 is an apocalyptic number.

It is an amenable number.

6988881 is a deficient number, since it is larger than the sum of its proper divisors (2379183).

6988881 is a wasteful number, since it uses less digits than its factorization.

6988881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12391.

The product of its digits is 221184, while the sum is 48.

The square root of 6988881 is about 2643.6491824749. The cubic root of 6988881 is about 191.1917794503.

The spelling of 6988881 in words is "six million, nine hundred eighty-eight thousand, eight hundred eighty-one".