828488665 has 4 divisors (see below), whose sum is σ = 994186404. Its totient is φ = 662790928.

The previous prime is 828488663. The next prime is 828488677. The reversal of 828488665 is 566884828.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 176145984 + 652342681 = 13272^2 + 25541^2 .

It is a cyclic number.

It is not a de Polignac number, because 828488665 - 2¹ = 828488663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (828488663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82848862 + ... + 82848871.

It is an arithmetic number, because the mean of its divisors is an integer number (248546601).

Almost surely, 2^828488665 is an apocalyptic number.

It is an amenable number.

828488665 is a deficient number, since it is larger than the sum of its proper divisors (165697739).

828488665 is a wasteful number, since it uses less digits than its factorization.

828488665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165697738.

The product of its digits is 5898240, while the sum is 55.

The square root of 828488665 is about 28783.4790287762. The cubic root of 828488665 is about 939.2088805424.

The spelling of 828488665 in words is "eight hundred twenty-eight million, four hundred eighty-eight thousand, six hundred sixty-five".