6810840 has 48 divisors (see below), whose sum is σ = 22136400. Its totient is φ = 1816128.

The previous prime is 6810809. The next prime is 6810841. The reversal of 6810840 is 480186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6810841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9100 + ... + 9819.

It is an arithmetic number, because the mean of its divisors is an integer number (461175).

Almost surely, 2^6810840 is an apocalyptic number.

6810840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6810840 is an abundant number, since it is smaller than the sum of its proper divisors (15325560).

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

6810840 is a wasteful number, since it uses less digits than its factorization.

6810840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18936 (or 18929 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 6810840 is about 2609.7586095269. The cubic root of 6810840 is about 189.5542644585.

The spelling of 6810840 in words is "six million, eight hundred ten thousand, eight hundred forty".