1898858881920 has 3072 divisors, whose sum is σ = 8889224601600. Its totient is φ = 338146099200.

The previous prime is 1898858881919. The next prime is 1898858881943. The reversal of 1898858881920 is 291888588981.

It is a congruent number.

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 383 ways as a sum of consecutive naturals, for example, 12094642482 + ... + 12094642638.

It is an arithmetic number, because the mean of its divisors is an integer number (2893627800).

Almost surely, 2^{1898858881920} is an apocalyptic number.

1898858881920 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 1898858881920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4444612300800).

1898858881920 is an abundant number, since it is smaller than the sum of its proper divisors (6990365719680).

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

1898858881920 is a wasteful number, since it uses less digits than its factorization.

1898858881920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 212336640, while the sum is 75.

The spelling of 1898858881920 in words is "one trillion, eight hundred ninety-eight billion, eight hundred fifty-eight million, eight hundred eighty-one thousand, nine hundred twenty".