1115910120 has 256 divisors, whose sum is σ = 3759436800. Its totient is φ = 263208960.

The previous prime is 1115910101. The next prime is 1115910139. The reversal of 1115910120 is 210195111.

It is an interprime number because it is at equal distance from previous prime (1115910101) and next prime (1115910139).

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, 4668961 + ... + 4669199.

It is an arithmetic number, because the mean of its divisors is an integer number (14685300).

Almost surely, 2^1115910120 is an apocalyptic number.

1115910120 is a gapful number since it is divisible by the number (10) 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 1115910120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1879718400).

1115910120 is an abundant number, since it is smaller than the sum of its proper divisors (2643526680).

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

1115910120 is a wasteful number, since it uses less digits than its factorization.

1115910120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 21.

The square root of 1115910120 is about 33405.2409061812. The cubic root of 1115910120 is about 1037.2331905972.

The spelling of 1115910120 in words is "one billion, one hundred fifteen million, nine hundred ten thousand, one hundred twenty".