870000 has 100 divisors (see below), whose sum is σ = 2905320. Its totient is φ = 224000.

The previous prime is 869989. The next prime is 870007. The reversal of 870000 is 78.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870007) by changing a digit.

870000 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 19 ways as a sum of consecutive naturals, for example, 29986 + ... + 30014.

2⁸⁷⁰⁰⁰⁰ is an apocalyptic number.

870000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 870000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1452660).

870000 is an abundant number, since it is smaller than the sum of its proper divisors (2035320).

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

870000 is a wasteful number, since it uses less digits than its factorization.

870000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 870000 is about 932.7379053089. The cubic root of 870000 is about 95.4640270936.

Adding to 870000 its reverse (78), we get a palindrome (870078).

The spelling of 870000 in words is "eight hundred seventy thousand".