9955878 has 16 divisors (see below), whose sum is σ = 19965360. Its totient is φ = 3309696.

The previous prime is 9955853. The next prime is 9955901. The reversal of 9955878 is 8785599.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9955878.

It is a congruent number.

It is an unprimeable number.

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, 426 + ... + 4482.

It is an arithmetic number, because the mean of its divisors is an integer number (1247835).

Almost surely, 2^9955878 is an apocalyptic number.

9955878 is an abundant number, since it is smaller than the sum of its proper divisors (10009482).

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

9955878 is a wasteful number, since it uses less digits than its factorization.

9955878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4471.

The product of its digits is 907200, while the sum is 51.

The square root of 9955878 is about 3155.2936471904. The cubic root of 9955878 is about 215.1261419498.

The spelling of 9955878 in words is "nine million, nine hundred fifty-five thousand, eight hundred seventy-eight".