828259649 has 4 divisors (see below), whose sum is σ = 946582464. Its totient is φ = 709936836.

The previous prime is 828259637. The next prime is 828259657. The reversal of 828259649 is 946952828.

828259649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 828259649 - 2¹⁶ = 828194113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 828259649.

It is not an unprimeable number, because it can be changed into a prime (828259699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59161397 + ... + 59161410.

It is an arithmetic number, because the mean of its divisors is an integer number (236645616).

Almost surely, 2^828259649 is an apocalyptic number.

It is an amenable number.

828259649 is a deficient number, since it is larger than the sum of its proper divisors (118322815).

828259649 is a wasteful number, since it uses less digits than its factorization.

828259649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118322814.

The product of its digits is 2488320, while the sum is 53.

The square root of 828259649 is about 28779.5004994875. The cubic root of 828259649 is about 939.1223319098.

The spelling of 828259649 in words is "eight hundred twenty-eight million, two hundred fifty-nine thousand, six hundred forty-nine".