9869820 has 48 divisors (see below), whose sum is σ = 27783168. Its totient is φ = 2617920.

The previous prime is 9869801. The next prime is 9869851. The reversal of 9869820 is 289689.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15957 + ... + 16563.

It is an arithmetic number, because the mean of its divisors is an integer number (578816).

Almost surely, 2^9869820 is an apocalyptic number.

It is an amenable number.

9869820 is an abundant number, since it is smaller than the sum of its proper divisors (17913348).

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

9869820 is a wasteful number, since it uses less digits than its factorization.

9869820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 9869820 is about 3141.6269670348. The cubic root of 9869820 is about 214.5045016198.

The spelling of 9869820 in words is "nine million, eight hundred sixty-nine thousand, eight hundred twenty".