870628 has 24 divisors (see below), whose sum is σ = 1701504. Its totient is φ = 386400.

The previous prime is 870613. The next prime is 870629. The reversal of 870628 is 826078.

It is a super-2 number, since 2×870628² = 1515986228768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 870628.

It is not an unprimeable number, because it can be changed into a prime (870629) by changing a digit.

870628 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 7 ways as a sum of consecutive naturals, for example, 1858 + ... + 2278.

It is an arithmetic number, because the mean of its divisors is an integer number (70896).

2⁸⁷⁰⁶²⁸ is an apocalyptic number.

It is an amenable number.

870628 is a deficient number, since it is larger than the sum of its proper divisors (830876).

870628 is a wasteful number, since it uses less digits than its factorization.

870628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 870628 is about 933.0744879162. The cubic root of 870628 is about 95.4869914575.

The spelling of 870628 in words is "eight hundred seventy thousand, six hundred twenty-eight".