128817116 has 24 divisors (see below), whose sum is σ = 230985216. Its totient is φ = 62838720.

The previous prime is 128817097. The next prime is 128817179. The reversal of 128817116 is 611718821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28910 + ... + 33066.

It is an arithmetic number, because the mean of its divisors is an integer number (9624384).

Almost surely, 2^128817116 is an apocalyptic number.

It is an amenable number.

128817116 is a deficient number, since it is larger than the sum of its proper divisors (102168100).

128817116 is a wasteful number, since it uses less digits than its factorization.

128817116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4349 (or 4347 counting only the distinct ones).

The product of its digits is 5376, while the sum is 35.

The square root of 128817116 is about 11349.7628169050. The cubic root of 128817116 is about 505.0385436058.

The spelling of 128817116 in words is "one hundred twenty-eight million, eight hundred seventeen thousand, one hundred sixteen".