1129839768 has 144 divisors (see below), whose sum is σ = 3244718880. Its totient is φ = 354993408.

The previous prime is 1129839727. The next prime is 1129839791. The reversal of 1129839768 is 8679389211.

It is a congruent number.

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 35 ways as a sum of consecutive naturals, for example, 2845746 + ... + 2846142.

It is an arithmetic number, because the mean of its divisors is an integer number (22532770).

Almost surely, 2^1129839768 is an apocalyptic number.

1129839768 is a gapful number since it is divisible by the number (18) 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 1129839768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1622359440).

1129839768 is an abundant number, since it is smaller than the sum of its proper divisors (2114879112).

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

1129839768 is a wasteful number, since it uses less digits than its factorization.

1129839768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514 (or 478 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 1129839768 is about 33613.0892361889. The cubic root of 1129839768 is about 1041.5312035586.

The spelling of 1129839768 in words is "one billion, one hundred twenty-nine million, eight hundred thirty-nine thousand, seven hundred sixty-eight".