128768616 has 48 divisors (see below), whose sum is σ = 361670400. Its totient is φ = 42922224.

The previous prime is 128768611. The next prime is 128768623. The reversal of 128768616 is 616867821.

It is a happy number.

128768616 is a `hidden beast` number, since 1 + 28 + 7 + 6 + 8 + 616 = 666.

It is not an unprimeable number, because it can be changed into a prime (128768611) 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, 31176 + ... + 35063.

It is an arithmetic number, because the mean of its divisors is an integer number (7534800).

Almost surely, 2^128768616 is an apocalyptic number.

It is an amenable number.

128768616 is an abundant number, since it is smaller than the sum of its proper divisors (232901784).

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

128768616 is an equidigital number, since it uses as much as digits as its factorization.

128768616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66260 (or 66244 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 128768616 is about 11347.6260072316. The cubic root of 128768616 is about 504.9751528473.

The spelling of 128768616 in words is "one hundred twenty-eight million, seven hundred sixty-eight thousand, six hundred sixteen".