1988565568 has 56 divisors (see below), whose sum is σ = 4347569664. Its totient is φ = 894912000.

The previous prime is 1988565563. The next prime is 1988565569. The reversal of 1988565568 is 8655658891.

It is not an unprimeable number, because it can be changed into a prime (1988565563) 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 7 ways as a sum of consecutive naturals, for example, 57121 + ... + 85087.

Almost surely, 2^1988565568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1988565568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2173784832).

1988565568 is an abundant number, since it is smaller than the sum of its proper divisors (2359004096).

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

1988565568 is a wasteful number, since it uses less digits than its factorization.

1988565568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28091 (or 28081 counting only the distinct ones).

The product of its digits is 20736000, while the sum is 61.

The square root of 1988565568 is about 44593.3354661882. The cubic root of 1988565568 is about 1257.5153792121.

The spelling of 1988565568 in words is "one billion, nine hundred eighty-eight million, five hundred sixty-five thousand, five hundred sixty-eight".