1123131648 has 108 divisors (see below), whose sum is σ = 3155551728. Its totient is φ = 354585600.

The previous prime is 1123131641. The next prime is 1123131661. The reversal of 1123131648 is 8461313211.

It is a super-2 number, since 2×1123131648² = 2522849397478391808, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1123131641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 275223 + ... + 279273.

Almost surely, 2^1123131648 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 1123131648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1577775864).

1123131648 is an abundant number, since it is smaller than the sum of its proper divisors (2032420080).

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

1123131648 is an equidigital number, since it uses as much as digits as its factorization.

1123131648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4108 (or 4075 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 1123131648 is about 33513.1563419502. The cubic root of 1123131648 is about 1039.4658400927.

Adding to 1123131648 its reverse (8461313211), we get a palindrome (9584444859).

The spelling of 1123131648 in words is "one billion, one hundred twenty-three million, one hundred thirty-one thousand, six hundred forty-eight".