1998883140 has 48 divisors (see below), whose sum is σ = 5615155392. Its totient is φ = 531294336.

The previous prime is 1998883123. The next prime is 1998883151. The reversal of 1998883140 is 413888991.

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, 35839 + ... + 72678.

It is an arithmetic number, because the mean of its divisors is an integer number (116982404).

Almost surely, 2^1998883140 is an apocalyptic number.

1998883140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1998883140 is an abundant number, since it is smaller than the sum of its proper divisors (3616272252).

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

1998883140 is a wasteful number, since it uses less digits than its factorization.

1998883140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108836 (or 108834 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 51.

The square root of 1998883140 is about 44708.8709318408. The cubic root of 1998883140 is about 1259.6864803219.

The spelling of 1998883140 in words is "one billion, nine hundred ninety-eight million, eight hundred eighty-three thousand, one hundred forty".