828436009 has 4 divisors (see below), whose sum is σ = 834760080. Its totient is φ = 822111940.

The previous prime is 828436001. The next prime is 828436097. The reversal of 828436009 is 900634828.

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 a cyclic number.

It is not a de Polignac number, because 828436009 - 2³ = 828436001 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (828436001) 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, 3161839 + ... + 3162100.

It is an arithmetic number, because the mean of its divisors is an integer number (208690020).

Almost surely, 2^828436009 is an apocalyptic number.

It is an amenable number.

828436009 is a deficient number, since it is larger than the sum of its proper divisors (6324071).

828436009 is a wasteful number, since it uses less digits than its factorization.

828436009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6324070.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 828436009 is about 28782.5643228674. The cubic root of 828436009 is about 939.1889824506.

The spelling of 828436009 in words is "eight hundred twenty-eight million, four hundred thirty-six thousand, nine".