9957820 has 24 divisors (see below), whose sum is σ = 21587328. Its totient is φ = 3854400.

The previous prime is 9957769. The next prime is 9957863. The reversal of 9957820 is 287599.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7411 + ... + 8650.

It is an arithmetic number, because the mean of its divisors is an integer number (899472).

Almost surely, 2^9957820 is an apocalyptic number.

It is an amenable number.

9957820 is an abundant number, since it is smaller than the sum of its proper divisors (11629508).

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

9957820 is a wasteful number, since it uses less digits than its factorization.

9957820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16101 (or 16099 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 9957820 is about 3155.6013689945. The cubic root of 9957820 is about 215.1401285885.

The spelling of 9957820 in words is "nine million, nine hundred fifty-seven thousand, eight hundred twenty".