1189797568 has 42 divisors (see below), whose sum is σ = 2388848156. Its totient is φ = 587963904.

The previous prime is 1189797563. The next prime is 1189797571. The reversal of 1189797568 is 8657979811.

It is not an unprimeable number, because it can be changed into a prime (1189797563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 505771 + ... + 508117.

Almost surely, 2^1189797568 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 1189797568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1194424078).

1189797568 is an abundant number, since it is smaller than the sum of its proper divisors (1199050588).

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

1189797568 is an frugal number, since it uses more digits than its factorization.

1189797568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537 (or 2438 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 61.

The square root of 1189797568 is about 34493.4423912720. The cubic root of 1189797568 is about 1059.6384099533.

The spelling of 1189797568 in words is "one billion, one hundred eighty-nine million, seven hundred ninety-seven thousand, five hundred sixty-eight".