9856988285 has 16 divisors (see below), whose sum is σ = 12225620736. Its totient is φ = 7624811328.

The previous prime is 9856988269. The next prime is 9856988299. The reversal of 9856988285 is 5828896589.

It is a cyclic number.

It is not a de Polignac number, because 9856988285 - 2⁴ = 9856988269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233174 + ... + 272183.

It is an arithmetic number, because the mean of its divisors is an integer number (764101296).

Almost surely, 2^9856988285 is an apocalyptic number.

It is an amenable number.

9856988285 is a deficient number, since it is larger than the sum of its proper divisors (2368632451).

9856988285 is a wasteful number, since it uses less digits than its factorization.

9856988285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505492.

The product of its digits is 99532800, while the sum is 68.

The square root of 9856988285 is about 99282.3664353343. The cubic root of 9856988285 is about 2144.1150247987.

The spelling of 9856988285 in words is "nine billion, eight hundred fifty-six million, nine hundred eighty-eight thousand, two hundred eighty-five".