871890 has 16 divisors (see below), whose sum is σ = 2092608. Its totient is φ = 232496.

The previous prime is 871883. The next prime is 871901. The reversal of 871890 is 98178.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 871890.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14502 + ... + 14561.

It is an arithmetic number, because the mean of its divisors is an integer number (130788).

2⁸⁷¹⁸⁹⁰ is an apocalyptic number.

871890 is an abundant number, since it is smaller than the sum of its proper divisors (1220718).

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

871890 is a wasteful number, since it uses less digits than its factorization.

871890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29073.

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 871890 is about 933.7505020079. The cubic root of 871890 is about 95.5331062180.

The spelling of 871890 in words is "eight hundred seventy-one thousand, eight hundred ninety".