8998121040 has 80 divisors (see below), whose sum is σ = 27958918848. Its totient is φ = 2393929728.

The previous prime is 8998121003. The next prime is 8998121053. The reversal of 8998121040 is 401218998.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 8998120983 and 8998121001.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 60627 + ... + 147213.

Almost surely, 2^8998121040 is an apocalyptic number.

8998121040 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 8998121040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13979459424).

8998121040 is an abundant number, since it is smaller than the sum of its proper divisors (18960797808).

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

8998121040 is a wasteful number, since it uses less digits than its factorization.

8998121040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87036 (or 87030 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 8998121040 is about 94858.4262994068. The cubic root of 8998121040 is about 2079.9390576326.

The spelling of 8998121040 in words is "eight billion, nine hundred ninety-eight million, one hundred twenty-one thousand, forty".