828173985 has 32 divisors (see below), whose sum is σ = 1352663040. Its totient is φ = 432589248.

The previous prime is 828173971. The next prime is 828173993. The reversal of 828173985 is 589371828.

828173985 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 828173985 - 2⁵ = 828173953 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147744 + ... + 153246.

It is an arithmetic number, because the mean of its divisors is an integer number (42270720).

Almost surely, 2^828173985 is an apocalyptic number.

It is an amenable number.

828173985 is a deficient number, since it is larger than the sum of its proper divisors (524489055).

828173985 is a wasteful number, since it uses less digits than its factorization.

828173985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5717.

The product of its digits is 967680, while the sum is 51.

The square root of 828173985 is about 28778.0121794401. The cubic root of 828173985 is about 939.0899540803.

The spelling of 828173985 in words is "eight hundred twenty-eight million, one hundred seventy-three thousand, nine hundred eighty-five".