1128788136 has 80 divisors (see below), whose sum is σ = 3613331040. Its totient is φ = 322509600.

The previous prime is 1128788107. The next prime is 1128788137. The reversal of 1128788136 is 6318878211.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1128788091 and 1128788100.

It is not an unprimeable number, because it can be changed into a prime (1128788137) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 119890 + ... + 128961.

It is an arithmetic number, because the mean of its divisors is an integer number (45166638).

Almost surely, 2^1128788136 is an apocalyptic number.

It is an amenable number.

1128788136 is an abundant number, since it is smaller than the sum of its proper divisors (2484542904).

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

1128788136 is a wasteful number, since it uses less digits than its factorization.

1128788136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248876 (or 248863 counting only the distinct ones).

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

The square root of 1128788136 is about 33597.4424026592. The cubic root of 1128788136 is about 1041.2079578561.

The spelling of 1128788136 in words is "one billion, one hundred twenty-eight million, seven hundred eighty-eight thousand, one hundred thirty-six".