828640099 has 4 divisors (see below), whose sum is σ = 947017264. Its totient is φ = 710262936.

The previous prime is 828640097. The next prime is 828640117. The reversal of 828640099 is 990046828.

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

It is a cyclic number.

It is not a de Polignac number, because 828640099 - 2¹ = 828640097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (828640091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59188572 + ... + 59188585.

It is an arithmetic number, because the mean of its divisors is an integer number (236754316).

Almost surely, 2^828640099 is an apocalyptic number.

828640099 is a deficient number, since it is larger than the sum of its proper divisors (118377165).

828640099 is a wasteful number, since it uses less digits than its factorization.

828640099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118377164.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 828640099 is about 28786.1094800947. The cubic root of 828640099 is about 939.2661009965.

The spelling of 828640099 in words is "eight hundred twenty-eight million, six hundred forty thousand, ninety-nine".