9988811 has 16 divisors (see below), whose sum is σ = 11755200. Its totient is φ = 8311680.

The previous prime is 9988793. The next prime is 9988817. The reversal of 9988811 is 1188899.

It is a happy number.

9988811 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9988811 - 2⁶ = 9988747 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9988817) 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, 63545 + ... + 63701.

It is an arithmetic number, because the mean of its divisors is an integer number (734700).

Almost surely, 2^9988811 is an apocalyptic number.

9988811 is a deficient number, since it is larger than the sum of its proper divisors (1766389).

9988811 is a wasteful number, since it uses less digits than its factorization.

9988811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374.

The product of its digits is 41472, while the sum is 44.

The square root of 9988811 is about 3160.5080287827. The cubic root of 9988811 is about 215.3630857830.

It can be divided in two parts, 99888 and 11, that added together give a palindrome (99899).

The spelling of 9988811 in words is "nine million, nine hundred eighty-eight thousand, eight hundred eleven".