128136036 has 96 divisors (see below), whose sum is σ = 369008640. Its totient is φ = 33796224.

The previous prime is 128135999. The next prime is 128136037. The reversal of 128136036 is 630631821.

128136036 is a nontrivial binomial coefficient, being equal to C(16009, 2).

It is a junction number, because it is equal to n+sod(n) for n = 128135994 and 128136012.

It is not an unprimeable number, because it can be changed into a prime (128136037) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54885 + ... + 57171.

It is an arithmetic number, because the mean of its divisors is an integer number (3843840).

Almost surely, 2^128136036 is an apocalyptic number.

128136036 is the 16008-th triangular number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128136036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184504320).

128136036 is an abundant number, since it is smaller than the sum of its proper divisors (240872604).

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

128136036 is a wasteful number, since it uses less digits than its factorization.

128136036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353 (or 2351 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 128136036 is about 11319.7189011035. The cubic root of 128136036 is about 504.1468928094.

Adding to 128136036 its reverse (630631821), we get a palindrome (758767857).

The spelling of 128136036 in words is "one hundred twenty-eight million, one hundred thirty-six thousand, thirty-six".