6991088 has 80 divisors (see below), whose sum is σ = 16144800. Its totient is φ = 2903040.

The previous prime is 6991043. The next prime is 6991091. The reversal of 6991088 is 8801996.

It is a super-2 number, since 2×6991088² = 97750622847488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114578 + ... + 114638.

It is an arithmetic number, because the mean of its divisors is an integer number (201810).

Almost surely, 2^6991088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6991088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8072400).

6991088 is an abundant number, since it is smaller than the sum of its proper divisors (9153712).

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

6991088 is a wasteful number, since it uses less digits than its factorization.

6991088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 6991088 is about 2644.0665649715. The cubic root of 6991088 is about 191.2119026454.

The spelling of 6991088 in words is "six million, nine hundred ninety-one thousand, eighty-eight".