1980839988 has 48 divisors (see below), whose sum is σ = 5138098560. Its totient is φ = 659947392.

The previous prime is 1980839911. The next prime is 1980839989. The reversal of 1980839988 is 8899380891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980839989) by changing a digit.

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, 308620 + ... + 314972.

It is an arithmetic number, because the mean of its divisors is an integer number (107043720).

Almost surely, 2^1980839988 is an apocalyptic number.

1980839988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1980839988 is an abundant number, since it is smaller than the sum of its proper divisors (3157258572).

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

1980839988 is a wasteful number, since it uses less digits than its factorization.

1980839988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9253 (or 9245 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 63.

The square root of 1980839988 is about 44506.6285849647. The cubic root of 1980839988 is about 1255.8847827628.

The spelling of 1980839988 in words is "one billion, nine hundred eighty million, eight hundred thirty-nine thousand, nine hundred eighty-eight".