1988945580 has 24 divisors (see below), whose sum is σ = 5569047792. Its totient is φ = 530385472.

The previous prime is 1988945573. The next prime is 1988945597. The reversal of 1988945580 is 855498891.

It is a self number, because there is not a number n which added to its sum of digits gives 1988945580.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16574487 + ... + 16574606.

It is an arithmetic number, because the mean of its divisors is an integer number (232043658).

Almost surely, 2^1988945580 is an apocalyptic number.

1988945580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1988945580 is an abundant number, since it is smaller than the sum of its proper divisors (3580102212).

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

1988945580 is a wasteful number, since it uses less digits than its factorization.

1988945580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33149105 (or 33149103 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 57.

The square root of 1988945580 is about 44597.5961235580. The cubic root of 1988945580 is about 1257.5954772327.

The spelling of 1988945580 in words is "one billion, nine hundred eighty-eight million, nine hundred forty-five thousand, five hundred eighty".