9988865444 has 24 divisors (see below), whose sum is σ = 18468051840. Its totient is φ = 4719608096.

The previous prime is 9988865443. The next prime is 9988865449. The reversal of 9988865444 is 4445688899.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9988865441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 910622 + ... + 921525.

It is an arithmetic number, because the mean of its divisors is an integer number (769502160).

Almost surely, 2^9988865444 is an apocalyptic number.

9988865444 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

It is an amenable number.

9988865444 is a deficient number, since it is larger than the sum of its proper divisors (8479186396).

9988865444 is a wasteful number, since it uses less digits than its factorization.

9988865444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832227 (or 1832225 counting only the distinct ones).

The product of its digits is 79626240, while the sum is 65.

The square root of 9988865444 is about 99944.3117140741. The cubic root of 9988865444 is about 2153.6347706100.

The spelling of 9988865444 in words is "nine billion, nine hundred eighty-eight million, eight hundred sixty-five thousand, four hundred forty-four".