9889857 has 12 divisors (see below), whose sum is σ = 14814800. Its totient is φ = 6593076.

The previous prime is 9889849. The next prime is 9889877. The reversal of 9889857 is 7589889.

It is not a de Polignac number, because 9889857 - 2³ = 9889849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9889807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20107 + ... + 20592.

Almost surely, 2^9889857 is an apocalyptic number.

It is an amenable number.

9889857 is a deficient number, since it is larger than the sum of its proper divisors (4924943).

9889857 is an equidigital number, since it uses as much as digits as its factorization.

9889857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40714 (or 40702 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The square root of 9889857 is about 3144.8143029438. The cubic root of 9889857 is about 214.6495607144.

Subtracting from 9889857 its reverse (7589889), we obtain a cube (2299968 = 132³).

The spelling of 9889857 in words is "nine million, eight hundred eighty-nine thousand, eight hundred fifty-seven".