825820828 has 24 divisors (see below), whose sum is σ = 1676296832. Its totient is φ = 348639984.

The previous prime is 825820813. The next prime is 825820829. The reversal of 825820828 is 828028528.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825820829) 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 7 ways as a sum of consecutive naturals, for example, 218226 + ... + 221977.

Almost surely, 2^825820828 is an apocalyptic number.

It is an amenable number.

825820828 is an abundant number, since it is smaller than the sum of its proper divisors (850476004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

825820828 is a wasteful number, since it uses less digits than its factorization.

825820828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440281 (or 440279 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 43.

The square root of 825820828 is about 28737.0984617445. The cubic root of 825820828 is about 938.1996731995.

The spelling of 825820828 in words is "eight hundred twenty-five million, eight hundred twenty thousand, eight hundred twenty-eight".