9888642 has 24 divisors (see below), whose sum is σ = 22220016. Its totient is φ = 3296052.

The previous prime is 9888631. The next prime is 9888661. The reversal of 9888642 is 2468889.

It is a happy number.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9688 + ... + 10659.

It is an arithmetic number, because the mean of its divisors is an integer number (925834).

Almost surely, 2^9888642 is an apocalyptic number.

9888642 is an abundant number, since it is smaller than the sum of its proper divisors (12331374).

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

9888642 is a wasteful number, since it uses less digits than its factorization.

9888642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20364 (or 20352 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 9888642 is about 3144.6211218524. The cubic root of 9888642 is about 214.6407702302.

The spelling of 9888642 in words is "nine million, eight hundred eighty-eight thousand, six hundred forty-two".