1129956512 has 48 divisors (see below), whose sum is σ = 2325117312. Its totient is φ = 539531520.

The previous prime is 1129956511. The next prime is 1129956523. The reversal of 1129956512 is 2156599211.

It is a super-2 number, since 2×1129956512² = 2553603438022412288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1129956512.

It is not an unprimeable number, because it can be changed into a prime (1129956511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780173 + ... + 781619.

It is an arithmetic number, because the mean of its divisors is an integer number (48439944).

Almost surely, 2^1129956512 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 1129956512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1162558656).

1129956512 is an abundant number, since it is smaller than the sum of its proper divisors (1195160800).

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

1129956512 is a wasteful number, since it uses less digits than its factorization.

1129956512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541 (or 2533 counting only the distinct ones).

The product of its digits is 48600, while the sum is 41.

The square root of 1129956512 is about 33614.8257767313. The cubic root of 1129956512 is about 1041.5670754095.

The spelling of 1129956512 in words is "one billion, one hundred twenty-nine million, nine hundred fifty-six thousand, five hundred twelve".