1163557920 has 288 divisors, whose sum is σ = 4338847296. Its totient is φ = 261273600.

The previous prime is 1163557909. The next prime is 1163557933. The reversal of 1163557920 is 297553611.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1434315 + ... + 1435125.

It is an arithmetic number, because the mean of its divisors is an integer number (15065442).

Almost surely, 2^1163557920 is an apocalyptic number.

1163557920 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 1163557920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2169423648).

1163557920 is an abundant number, since it is smaller than the sum of its proper divisors (3175289376).

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

1163557920 is a wasteful number, since it uses less digits than its factorization.

1163557920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904 (or 889 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 1163557920 is about 34110.9648060561. The cubic root of 1163557920 is about 1051.7907220555.

The spelling of 1163557920 in words is "one billion, one hundred sixty-three million, five hundred fifty-seven thousand, nine hundred twenty".