1129805568 has 54 divisors (see below), whose sum is σ = 3257514624. Its totient is φ = 376601088.

The previous prime is 1129805561. The next prime is 1129805587. The reversal of 1129805568 is 8655089211.

It is a happy number.

1129805568 is a `hidden beast` number, since 1 + 1 + 2 + 9 + 80 + 5 + 568 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129805561) 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, 242880 + ... + 247487.

Almost surely, 2^1129805568 is an apocalyptic number.

1129805568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1129805568 is an abundant number, since it is smaller than the sum of its proper divisors (2127709056).

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

1129805568 is an equidigital number, since it uses as much as digits as its factorization.

1129805568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490389 (or 490372 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 45.

The square root of 1129805568 is about 33612.5805019490. The cubic root of 1129805568 is about 1041.5206944794.

The spelling of 1129805568 in words is "one billion, one hundred twenty-nine million, eight hundred five thousand, five hundred sixty-eight".