8998061440 has 128 divisors (see below), whose sum is σ = 21874446720. Its totient is φ = 3538944000.

The previous prime is 8998061431. The next prime is 8998061441. The reversal of 8998061440 is 441608998.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8998061441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11981065 + ... + 11981815.

It is an arithmetic number, because the mean of its divisors is an integer number (170894115).

Almost surely, 2^8998061440 is an apocalyptic number.

8998061440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8998061440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10937223360).

8998061440 is an abundant number, since it is smaller than the sum of its proper divisors (12876385280).

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

8998061440 is a wasteful number, since it uses less digits than its factorization.

8998061440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060 (or 1048 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 8998061440 is about 94858.1121465107. The cubic root of 8998061440 is about 2079.9344653908.

The spelling of 8998061440 in words is "eight billion, nine hundred ninety-eight million, sixty-one thousand, four hundred forty".