1115129808 has 320 divisors, whose sum is σ = 3674764800. Its totient is φ = 321269760.

The previous prime is 1115129797. The next prime is 1115129819. The reversal of 1115129808 is 8089215111.

It is an interprime number because it is at equal distance from previous prime (1115129797) and next prime (1115129819).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6677341 + ... + 6677507.

It is an arithmetic number, because the mean of its divisors is an integer number (11483640).

Almost surely, 2^1115129808 is an apocalyptic number.

1115129808 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 1115129808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1837382400).

1115129808 is an abundant number, since it is smaller than the sum of its proper divisors (2559634992).

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

1115129808 is a wasteful number, since it uses less digits than its factorization.

1115129808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 36.

The square root of 1115129808 is about 33393.5593790180. The cubic root of 1115129808 is about 1036.9913687823.

The spelling of 1115129808 in words is "one billion, one hundred fifteen million, one hundred twenty-nine thousand, eight hundred eight".