871620 has 48 divisors (see below), whose sum is σ = 2486400. Its totient is φ = 228096.

The previous prime is 871613. The next prime is 871621. The reversal of 871620 is 26178.

It is not an unprimeable number, because it can be changed into a prime (871621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4281 + ... + 4479.

It is an arithmetic number, because the mean of its divisors is an integer number (51800).

2⁸⁷¹⁶²⁰ 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 871620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1243200).

871620 is an abundant number, since it is smaller than the sum of its proper divisors (1614780).

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

871620 is a wasteful number, since it uses less digits than its factorization.

871620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 871620 is about 933.6059125777. The cubic root of 871620 is about 95.5232438876.

Adding to 871620 its reverse (26178), we get a palindrome (897798).

The spelling of 871620 in words is "eight hundred seventy-one thousand, six hundred twenty".