870156 has 48 divisors (see below), whose sum is σ = 2580480. Its totient is φ = 248400.

The previous prime is 870151. The next prime is 870161. The reversal of 870156 is 651078.

It is an interprime number because it is at equal distance from previous prime (870151) and next prime (870161).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (870151) by changing a digit.

870156 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181 + ... + 1331.

It is an arithmetic number, because the mean of its divisors is an integer number (53760).

2⁸⁷⁰¹⁵⁶ 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 870156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1290240).

870156 is an abundant number, since it is smaller than the sum of its proper divisors (1710324).

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

870156 is a wasteful number, since it uses less digits than its factorization.

870156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171 (or 1163 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 870156 is about 932.8215263382. The cubic root of 870156 is about 95.4697326485.

The spelling of 870156 in words is "eight hundred seventy thousand, one hundred fifty-six".