9928857089142 has 28 divisors (see below), whose sum is σ = 22329713580300. Its totient is φ = 3309619029228.

The previous prime is 9928857089069. The next prime is 9928857089159. The reversal of 9928857089142 is 2419807588299.

9928857089142 is a `hidden beast` number, since 9 + 9 + 2 + 8 + 8 + 570 + 8 + 9 + 1 + 42 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 3404956392 + ... + 3404959307.

It is an arithmetic number, because the mean of its divisors is an integer number (797489770725).

Almost surely, 2^{9928857089142} is an apocalyptic number.

9928857089142 is an abundant number, since it is smaller than the sum of its proper divisors (12400856491158).

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

9928857089142 is an equidigital number, since it uses as much as digits as its factorization.

9928857089142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6809915719 (or 6809915704 counting only the distinct ones).

The product of its (nonzero) digits is 209018880, while the sum is 72.

The spelling of 9928857089142 in words is "nine trillion, nine hundred twenty-eight billion, eight hundred fifty-seven million, eighty-nine thousand, one hundred forty-two".