7871886 has 48 divisors (see below), whose sum is σ = 18869760. Its totient is φ = 2351760.

The previous prime is 7871873. The next prime is 7871887. The reversal of 7871886 is 6881787.

7871886 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7871887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16195 + ... + 16673.

It is an arithmetic number, because the mean of its divisors is an integer number (393120).

Almost surely, 2^7871886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7871886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9434880).

7871886 is an abundant number, since it is smaller than the sum of its proper divisors (10997874).

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

7871886 is a wasteful number, since it uses less digits than its factorization.

7871886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581 (or 578 counting only the distinct ones).

The product of its digits is 150528, while the sum is 45.

The square root of 7871886 is about 2805.6881508821. The cubic root of 7871886 is about 198.9266330557.

Subtracting from 7871886 its reverse (6881787), we obtain a palindrome (990099).

The spelling of 7871886 in words is "seven million, eight hundred seventy-one thousand, eight hundred eighty-six".