1999842880 has 84 divisors (see below), whose sum is σ = 5539659228. Its totient is φ = 685655040.

The previous prime is 1999842877. The next prime is 1999842881. The reversal of 1999842880 is 882489991.

It can be written as a sum of positive squares in 2 ways, for example, as 1240730176 + 759112704 = 35224^2 + 27552^2 .

It is not an unprimeable number, because it can be changed into a prime (1999842881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48091 + ... + 79450.

Almost surely, 2^1999842880 is an apocalyptic number.

1999842880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1999842880 is an abundant number, since it is smaller than the sum of its proper divisors (3539816348).

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

1999842880 is a wasteful number, since it uses less digits than its factorization.

1999842880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127572 (or 127555 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 58.

The square root of 1999842880 is about 44719.6028604906. The cubic root of 1999842880 is about 1259.8880558983. Note that the first 3 decimals are identical.

The spelling of 1999842880 in words is "one billion, nine hundred ninety-nine million, eight hundred forty-two thousand, eight hundred eighty".