820625828 has 36 divisors (see below), whose sum is σ = 1600881072. Its totient is φ = 365032080.

The previous prime is 820625821. The next prime is 820625833. The reversal of 820625828 is 828526028.

It is not an unprimeable number, because it can be changed into a prime (820625821) 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 11 ways as a sum of consecutive naturals, for example, 92975 + ... + 101417.

Almost surely, 2^820625828 is an apocalyptic number.

It is an amenable number.

820625828 is a deficient number, since it is larger than the sum of its proper divisors (780255244).

820625828 is a wasteful number, since it uses less digits than its factorization.

820625828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8552 (or 8503 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

The square root of 820625828 is about 28646.5674732593. The cubic root of 820625828 is about 936.2282191816.

The spelling of 820625828 in words is "eight hundred twenty million, six hundred twenty-five thousand, eight hundred twenty-eight".