9899862 has 48 divisors (see below), whose sum is σ = 23288832. Its totient is φ = 2797200.

The previous prime is 9899861. The next prime is 9899863. The reversal of 9899862 is 2689989.

It is an interprime number because it is at equal distance from previous prime (9899861) and next prime (9899863).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9899861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44283 + ... + 44505.

It is an arithmetic number, because the mean of its divisors is an integer number (485184).

Almost surely, 2^9899862 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9899862, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11644416).

9899862 is an abundant number, since it is smaller than the sum of its proper divisors (13388970).

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

9899862 is a wasteful number, since it uses less digits than its factorization.

9899862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 386 counting only the distinct ones).

The product of its digits is 559872, while the sum is 51.

The square root of 9899862 is about 3146.4046147945. The cubic root of 9899862 is about 214.7219191948.

The spelling of 9899862 in words is "nine million, eight hundred ninety-nine thousand, eight hundred sixty-two".