6991340 has 12 divisors (see below), whose sum is σ = 14681856. Its totient is φ = 2796528.

The previous prime is 6991319. The next prime is 6991363. The reversal of 6991340 is 431996.

It is a junction number, because it is equal to n+sod(n) for n = 6991297 and 6991306.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174764 + ... + 174803.

It is an arithmetic number, because the mean of its divisors is an integer number (1223488).

Almost surely, 2^6991340 is an apocalyptic number.

It is an amenable number.

6991340 is an abundant number, since it is smaller than the sum of its proper divisors (7690516).

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

6991340 is a wasteful number, since it uses less digits than its factorization.

6991340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349576 (or 349574 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 6991340 is about 2644.1142184104. The cubic root of 6991340 is about 191.2142000856.

The spelling of 6991340 in words is "six million, nine hundred ninety-one thousand, three hundred forty".