6887885 has 4 divisors (see below), whose sum is σ = 8265468. Its totient is φ = 5510304.

The previous prime is 6887863. The next prime is 6887893. The reversal of 6887885 is 5887886.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1036324 + 5851561 = 1018^2 + 2419^2 .

It is a cyclic number.

It is not a de Polignac number, because 6887885 - 2⁶ = 6887821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 688784 + ... + 688793.

It is an arithmetic number, because the mean of its divisors is an integer number (2066367).

Almost surely, 2^6887885 is an apocalyptic number.

It is an amenable number.

6887885 is a deficient number, since it is larger than the sum of its proper divisors (1377583).

6887885 is a wasteful number, since it uses less digits than its factorization.

6887885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377582.

The product of its digits is 860160, while the sum is 50.

The square root of 6887885 is about 2624.4780433450. The cubic root of 6887885 is about 190.2663393096.

Subtracting from 6887885 its reverse (5887886), we obtain a palindrome (999999).

The spelling of 6887885 in words is "six million, eight hundred eighty-seven thousand, eight hundred eighty-five".