1129919916 has 24 divisors (see below), whose sum is σ = 2638669824. Its totient is φ = 376327120.

The previous prime is 1129919891. The next prime is 1129919927. The reversal of 1129919916 is 6199199211.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23820 + ... + 53171.

It is an arithmetic number, because the mean of its divisors is an integer number (109944576).

Almost surely, 2^1129919916 is an apocalyptic number.

It is an amenable number.

1129919916 is an abundant number, since it is smaller than the sum of its proper divisors (1508749908).

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

1129919916 is a wasteful number, since it uses less digits than its factorization.

1129919916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78221 (or 78219 counting only the distinct ones).

The product of its digits is 78732, while the sum is 48.

The square root of 1129919916 is about 33614.2814291783. The cubic root of 1129919916 is about 1041.5558308469. Note that the first 3 decimals are identical.

The spelling of 1129919916 in words is "one billion, one hundred twenty-nine million, nine hundred nineteen thousand, nine hundred sixteen".