2129989568 has 112 divisors (see below), whose sum is σ = 5151729600. Its totient is φ = 852934656.

The previous prime is 2129989567. The next prime is 2129989573. The reversal of 2129989568 is 8659899212.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129989567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1133846 + ... + 1135722.

Almost surely, 2^2129989568 is an apocalyptic number.

2129989568 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2129989568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2575864800).

2129989568 is an abundant number, since it is smaller than the sum of its proper divisors (3021740032).

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

2129989568 is a wasteful number, since it uses less digits than its factorization.

2129989568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062 (or 2052 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 59.

The square root of 2129989568 is about 46151.8100186764. The cubic root of 2129989568 is about 1286.6462507014.

The spelling of 2129989568 in words is "two billion, one hundred twenty-nine million, nine hundred eighty-nine thousand, five hundred sixty-eight".