6885840 has 80 divisors (see below), whose sum is σ = 22998528. Its totient is φ = 1694208.

The previous prime is 6885821. The next prime is 6885883. The reversal of 6885840 is 485886.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 2017 + ... + 4223.

Almost surely, 2^6885840 is an apocalyptic number.

6885840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6885840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11499264).

6885840 is an abundant number, since it is smaller than the sum of its proper divisors (16112688).

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

6885840 is a wasteful number, since it uses less digits than its factorization.

6885840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236 (or 2230 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 6885840 is about 2624.0884131446. The cubic root of 6885840 is about 190.2475075406.

The spelling of 6885840 in words is "six million, eight hundred eighty-five thousand, eight hundred forty".