828405803 has 4 divisors (see below), whose sum is σ = 841986288. Its totient is φ = 814825320.

The previous prime is 828405751. The next prime is 828405821. The reversal of 828405803 is 308504828.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-828405803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (828405863) 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, 6790151 + ... + 6790272.

It is an arithmetic number, because the mean of its divisors is an integer number (210496572).

Almost surely, 2^828405803 is an apocalyptic number.

828405803 is a deficient number, since it is larger than the sum of its proper divisors (13580485).

828405803 is a wasteful number, since it uses less digits than its factorization.

828405803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13580484.

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 828405803 is about 28782.0395906892. The cubic root of 828405803 is about 939.1775675729.

The spelling of 828405803 in words is "eight hundred twenty-eight million, four hundred five thousand, eight hundred three".