1128768138 has 12 divisors (see below), whose sum is σ = 2445664338. Its totient is φ = 376256040.

The previous prime is 1128768133. The next prime is 1128768149. The reversal of 1128768138 is 8318678211.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 732081249 + 396686889 = 27057^2 + 19917^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1128768093 and 1128768102.

It is not an unprimeable number, because it can be changed into a prime (1128768133) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 31354653 + ... + 31354688.

Almost surely, 2^1128768138 is an apocalyptic number.

1128768138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1128768138 is an abundant number, since it is smaller than the sum of its proper divisors (1316896200).

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

1128768138 is a wasteful number, since it uses less digits than its factorization.

1128768138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62709349 (or 62709346 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 1128768138 is about 33597.1447894014. The cubic root of 1128768138 is about 1041.2018090200.

The spelling of 1128768138 in words is "one billion, one hundred twenty-eight million, seven hundred sixty-eight thousand, one hundred thirty-eight".