9998127440 has 160 divisors (see below), whose sum is σ = 27538237440. Its totient is φ = 3303475200.

The previous prime is 9998127437. The next prime is 9998127443. The reversal of 9998127440 is 447218999.

9998127440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9998127437) and next prime (9998127443).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998127443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4668770 + ... + 4670910.

It is an arithmetic number, because the mean of its divisors is an integer number (172113984).

Almost surely, 2^9998127440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9998127440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13769118720).

9998127440 is an abundant number, since it is smaller than the sum of its proper divisors (17540110000).

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

9998127440 is a wasteful number, since it uses less digits than its factorization.

9998127440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2461 (or 2455 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 9998127440 is about 99990.6367616488. The cubic root of 9998127440 is about 2154.3002046964.

The spelling of 9998127440 in words is "nine billion, nine hundred ninety-eight million, one hundred twenty-seven thousand, four hundred forty".