128308113 has 12 divisors (see below), whose sum is σ = 185695120. Its totient is φ = 85372056.

The previous prime is 128308109. The next prime is 128308127. The reversal of 128308113 is 311803821.

It is not a de Polignac number, because 128308113 - 2² = 128308109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128308133) 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, 8923 + ... + 18336.

Almost surely, 2^128308113 is an apocalyptic number.

It is an amenable number.

128308113 is a deficient number, since it is larger than the sum of its proper divisors (57387007).

128308113 is a wasteful number, since it uses less digits than its factorization.

128308113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27788 (or 27785 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 128308113 is about 11327.3171139507. The cubic root of 128308113 is about 504.3724689047.

The spelling of 128308113 in words is "one hundred twenty-eight million, three hundred eight thousand, one hundred thirteen".