870720 has 56 divisors (see below), whose sum is σ = 2767584. Its totient is φ = 231936.

The previous prime is 870703. The next prime is 870731. The reversal of 870720 is 27078.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 507 + ... + 1413.

2⁸⁷⁰⁷²⁰ is an apocalyptic number.

870720 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 870720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1383792).

870720 is an abundant number, since it is smaller than the sum of its proper divisors (1896864).

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

870720 is a wasteful number, since it uses less digits than its factorization.

870720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 870720 is about 933.1237860005. The cubic root of 870720 is about 95.4903547362.

Adding to 870720 its reverse (27078), we get a palindrome (897798).

The spelling of 870720 in words is "eight hundred seventy thousand, seven hundred twenty".