9828891 has 16 divisors (see below), whose sum is σ = 15032320. Its totient is φ = 6340680.

The previous prime is 9828881. The next prime is 9828901. The reversal of 9828891 is 1988289.

It is an interprime number because it is at equal distance from previous prime (9828881) and next prime (9828901).

It is not a de Polignac number, because 9828891 - 2⁵ = 9828859 is a prime.

It is a Duffinian number.

9828891 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9828821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5035 + ... + 6708.

It is an arithmetic number, because the mean of its divisors is an integer number (939520).

Almost surely, 2^9828891 is an apocalyptic number.

9828891 is a deficient number, since it is larger than the sum of its proper divisors (5203429).

9828891 is a wasteful number, since it uses less digits than its factorization.

9828891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11783 (or 11777 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 9828891 is about 3135.1062182963. The cubic root of 9828891 is about 214.2075823725.

The spelling of 9828891 in words is "nine million, eight hundred twenty-eight thousand, eight hundred ninety-one".