6871840 has 48 divisors (see below), whose sum is σ = 16805880. Its totient is φ = 2652160.

The previous prime is 6871831. The next prime is 6871841. The reversal of 6871840 is 481786.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5363856 + 1507984 = 2316^2 + 1228^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6871796 and 6871805.

It is not an unprimeable number, because it can be changed into a prime (6871841) 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, 3900 + ... + 5380.

Almost surely, 2^6871840 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 6871840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8402940).

6871840 is an abundant number, since it is smaller than the sum of its proper divisors (9934040).

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

6871840 is a wasteful number, since it uses less digits than its factorization.

6871840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525 (or 1517 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 6871840 is about 2621.4194628102. The cubic root of 6871840 is about 190.1184856527.

The spelling of 6871840 in words is "six million, eight hundred seventy-one thousand, eight hundred forty".