9878920 has 32 divisors (see below), whose sum is σ = 22317120. Its totient is φ = 3935680.

The previous prime is 9878903. The next prime is 9878923. The reversal of 9878920 is 298789.

9878920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (9878923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19389 + ... + 19891.

It is an arithmetic number, because the mean of its divisors is an integer number (697410).

Almost surely, 2^9878920 is an apocalyptic number.

It is an amenable number.

9878920 is an abundant number, since it is smaller than the sum of its proper divisors (12438200).

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

9878920 is a wasteful number, since it uses less digits than its factorization.

9878920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005 (or 1001 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 9878920 is about 3143.0749275192. The cubic root of 9878920 is about 214.5704059409.

The spelling of 9878920 in words is "nine million, eight hundred seventy-eight thousand, nine hundred twenty".