870928 has 20 divisors (see below), whose sum is σ = 1746540. Its totient is φ = 420224.

The previous prime is 870917. The next prime is 870929. The reversal of 870928 is 829078.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 501264 + 369664 = 708^2 + 608^2 .

It is a junction number, because it is equal to n+sod(n) for n = 870893 and 870902.

It is not an unprimeable number, because it can be changed into a prime (870929) by changing a digit.

870928 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 3 ways as a sum of consecutive naturals, for example, 475 + ... + 1402.

It is an arithmetic number, because the mean of its divisors is an integer number (87327).

2⁸⁷⁰⁹²⁸ is an apocalyptic number.

It is an amenable number.

870928 is an abundant number, since it is smaller than the sum of its proper divisors (875612).

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

870928 is a wasteful number, since it uses less digits than its factorization.

870928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914 (or 1908 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 870928 is about 933.2352329397. The cubic root of 870928 is about 95.4979577974.

The spelling of 870928 in words is "eight hundred seventy thousand, nine hundred twenty-eight".