9869920 has 24 divisors (see below), whose sum is σ = 23318064. Its totient is φ = 3947904.

The previous prime is 9869917. The next prime is 9869927. The reversal of 9869920 is 299689.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9869927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30684 + ... + 31003.

It is an arithmetic number, because the mean of its divisors is an integer number (971586).

Almost surely, 2^9869920 is an apocalyptic number.

It is an amenable number.

9869920 is an abundant number, since it is smaller than the sum of its proper divisors (13448144).

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

9869920 is a wasteful number, since it uses less digits than its factorization.

9869920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61702 (or 61694 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 9869920 is about 3141.6428823149. The cubic root of 9869920 is about 214.5052260632.

The spelling of 9869920 in words is "nine million, eight hundred sixty-nine thousand, nine hundred twenty".