872660 has 12 divisors (see below), whose sum is σ = 1832628. Its totient is φ = 349056.

The previous prime is 872659. The next prime is 872671. The reversal of 872660 is 66278.

It can be written as a sum of positive squares in 2 ways, for example, as 595984 + 276676 = 772^2 + 526^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21797 + ... + 21836.

It is an arithmetic number, because the mean of its divisors is an integer number (152719).

2⁸⁷²⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

872660 is an abundant number, since it is smaller than the sum of its proper divisors (959968).

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

872660 is a wasteful number, since it uses less digits than its factorization.

872660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43642 (or 43640 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 872660 is about 934.1627267238. The cubic root of 872660 is about 95.5612209449.

The spelling of 872660 in words is "eight hundred seventy-two thousand, six hundred sixty".