870660 has 72 divisors (see below), whose sum is σ = 3022656. Its totient is φ = 198720.

The previous prime is 870643. The next prime is 870679. The reversal of 870660 is 66078.

It is an unprimeable number.

870660 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 (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 915 + ... + 1605.

2⁸⁷⁰⁶⁶⁰ 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 870660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1511328).

870660 is an abundant number, since it is smaller than the sum of its proper divisors (2151996).

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

870660 is a wasteful number, since it uses less digits than its factorization.

870660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 870660 is about 933.0916353714. The cubic root of 870660 is about 95.4881613204.

The spelling of 870660 in words is "eight hundred seventy thousand, six hundred sixty".