1998890370960 has 480 divisors, whose sum is σ = 7427312121600. Its totient is φ = 444515807232.

The previous prime is 1998890370887. The next prime is 1998890370979. The reversal of 1998890370960 is 690730988991.

It is a super-2 number, since 2×1998890370960² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 112687212 + ... + 112704948.

It is an arithmetic number, because the mean of its divisors is an integer number (15473566920).

Almost surely, 2^{1998890370960} is an apocalyptic number.

1998890370960 is a gapful number since it is divisible by the number (10) 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 1998890370960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3713656060800).

1998890370960 is an abundant number, since it is smaller than the sum of its proper divisors (5428421750640).

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

1998890370960 is a wasteful number, since it uses less digits than its factorization.

1998890370960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17848 (or 17791 counting only the distinct ones).

The product of its (nonzero) digits is 52907904, while the sum is 69.

The spelling of 1998890370960 in words is "one trillion, nine hundred ninety-eight billion, eight hundred ninety million, three hundred seventy thousand, nine hundred sixty".