871740 has 72 divisors (see below), whose sum is σ = 2751840. Its totient is φ = 223104.

The previous prime is 871727. The next prime is 871763. The reversal of 871740 is 47178.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 871740.

It is an unprimeable number.

871740 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 23 ways as a sum of consecutive naturals, for example, 5137 + ... + 5303.

It is an arithmetic number, because the mean of its divisors is an integer number (38220).

2⁸⁷¹⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 871740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1375920).

871740 is an abundant number, since it is smaller than the sum of its proper divisors (1880100).

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

871740 is a wasteful number, since it uses less digits than its factorization.

871740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 871740 is about 933.6701773110. The cubic root of 871740 is about 95.5276273970.

The spelling of 871740 in words is "eight hundred seventy-one thousand, seven hundred forty".