828865188 has 36 divisors (see below), whose sum is σ = 2118736620. Its totient is φ = 273182976.

The previous prime is 828865171. The next prime is 828865189. The reversal of 828865188 is 881568828.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 102454884 + 726410304 = 10122^2 + 26952^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (828865189) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126145 + ... + 132552.

It is an arithmetic number, because the mean of its divisors is an integer number (58853795).

Almost surely, 2^828865188 is an apocalyptic number.

It is an amenable number.

828865188 is an abundant number, since it is smaller than the sum of its proper divisors (1289871432).

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

828865188 is a wasteful number, since it uses less digits than its factorization.

828865188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258796 (or 258791 counting only the distinct ones).

The product of its digits is 1966080, while the sum is 54.

The square root of 828865188 is about 28790.0188954436. The cubic root of 828865188 is about 939.3511396550.

The spelling of 828865188 in words is "eight hundred twenty-eight million, eight hundred sixty-five thousand, one hundred eighty-eight".