871816 has 16 divisors (see below), whose sum is σ = 1783440. Its totient is φ = 396240.

The previous prime is 871789. The next prime is 871817. The reversal of 871816 is 618178.

It is not an unprimeable number, because it can be changed into a prime (871817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4866 + ... + 5041.

It is an arithmetic number, because the mean of its divisors is an integer number (111465).

2⁸⁷¹⁸¹⁶ is an apocalyptic number.

It is an amenable number.

871816 is an abundant number, since it is smaller than the sum of its proper divisors (911624).

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

871816 is a wasteful number, since it uses less digits than its factorization.

871816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9924 (or 9920 counting only the distinct ones).

The product of its digits is 2688, while the sum is 31.

The square root of 871816 is about 933.7108760211. The cubic root of 871816 is about 95.5304034115.

It can be divided in two parts, 8 and 71816, that added together give a square (71824 = 268²).

The spelling of 871816 in words is "eight hundred seventy-one thousand, eight hundred sixteen".