9825820 has 24 divisors (see below), whose sum is σ = 21075264. Its totient is φ = 3846336.

The previous prime is 9825817. The next prime is 9825821. The reversal of 9825820 is 285289.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9825821) 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, 4287 + ... + 6166.

It is an arithmetic number, because the mean of its divisors is an integer number (878136).

Almost surely, 2^9825820 is an apocalyptic number.

It is an amenable number.

9825820 is an abundant number, since it is smaller than the sum of its proper divisors (11249444).

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

9825820 is a wasteful number, since it uses less digits than its factorization.

9825820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10509 (or 10507 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 9825820 is about 3134.6164039640. The cubic root of 9825820 is about 214.1852705976.

The spelling of 9825820 in words is "nine million, eight hundred twenty-five thousand, eight hundred twenty".