1163440128 has 104 divisors (see below), whose sum is σ = 3147047728. Its totient is φ = 382205952.

The previous prime is 1163440087. The next prime is 1163440139. The reversal of 1163440128 is 8210443611.

It is a junction number, because it is equal to n+sod(n) for n = 1163440095 and 1163440104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 896376 + ... + 897672.

Almost surely, 2^1163440128 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 1163440128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1573523864).

1163440128 is an abundant number, since it is smaller than the sum of its proper divisors (1983607600).

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

1163440128 is an equidigital number, since it uses as much as digits as its factorization.

1163440128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397 (or 1375 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 1163440128 is about 34109.2381621167. The cubic root of 1163440128 is about 1051.7552284166.

Adding to 1163440128 its reverse (8210443611), we get a palindrome (9373883739).

The spelling of 1163440128 in words is "one billion, one hundred sixty-three million, four hundred forty thousand, one hundred twenty-eight".