6891740 has 12 divisors (see below), whose sum is σ = 14472696. Its totient is φ = 2756688.

The previous prime is 6891733. The next prime is 6891769. The reversal of 6891740 is 471986.

It is a self number, because there is not a number n which added to its sum of digits gives 6891740.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172274 + ... + 172313.

It is an arithmetic number, because the mean of its divisors is an integer number (1206058).

Almost surely, 2^6891740 is an apocalyptic number.

It is an amenable number.

6891740 is an abundant number, since it is smaller than the sum of its proper divisors (7580956).

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

6891740 is a wasteful number, since it uses less digits than its factorization.

6891740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344596 (or 344594 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 6891740 is about 2625.2123723615. The cubic root of 6891740 is about 190.3018286721.

The spelling of 6891740 in words is "six million, eight hundred ninety-one thousand, seven hundred forty".