1129081976 has 64 divisors (see below), whose sum is σ = 2352706560. Its totient is φ = 507909600.

The previous prime is 1129081939. The next prime is 1129081991. The reversal of 1129081976 is 6791809211.

It is a super-2 number, since 2×1129081976² = 2549652217056129152, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1138841 + ... + 1139831.

It is an arithmetic number, because the mean of its divisors is an integer number (36761040).

Almost surely, 2^1129081976 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 1129081976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1176353280).

1129081976 is an abundant number, since it is smaller than the sum of its proper divisors (1223624584).

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

1129081976 is a wasteful number, since it uses less digits than its factorization.

1129081976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137 (or 1111 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 44.

The square root of 1129081976 is about 33601.8150700226. The cubic root of 1129081976 is about 1041.2982972188.

The spelling of 1129081976 in words is "one billion, one hundred twenty-nine million, eighty-one thousand, nine hundred seventy-six".