6991368 has 32 divisors (see below), whose sum is σ = 18044160. Its totient is φ = 2255040.

The previous prime is 6991363. The next prime is 6991381. The reversal of 6991368 is 8631996.

It is a super-2 number, since 2×6991368² = 97758453022848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6991363) 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, 3955 + ... + 5442.

It is an arithmetic number, because the mean of its divisors is an integer number (563880).

Almost surely, 2^6991368 is an apocalyptic number.

It is an amenable number.

6991368 is an abundant number, since it is smaller than the sum of its proper divisors (11052792).

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

6991368 is a wasteful number, since it uses less digits than its factorization.

6991368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9437 (or 9433 counting only the distinct ones).

The product of its digits is 69984, while the sum is 42.

The square root of 6991368 is about 2644.1195131839. The cubic root of 6991368 is about 191.2144553534.

The spelling of 6991368 in words is "six million, nine hundred ninety-one thousand, three hundred sixty-eight".