128764808 has 8 divisors (see below), whose sum is σ = 241434030. Its totient is φ = 64382400.

The previous prime is 128764807. The next prime is 128764829. The reversal of 128764808 is 808467821.

It can be written as a sum of positive squares in only one way, i.e., 110292004 + 18472804 = 10502^2 + 4298^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (128764807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8047793 + ... + 8047808.

Almost surely, 2^128764808 is an apocalyptic number.

It is an amenable number.

128764808 is a deficient number, since it is larger than the sum of its proper divisors (112669222).

128764808 is a wasteful number, since it uses less digits than its factorization.

128764808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16095607 (or 16095603 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 44.

The square root of 128764808 is about 11347.4582175922. The cubic root of 128764808 is about 504.9701750186.

The spelling of 128764808 in words is "one hundred twenty-eight million, seven hundred sixty-four thousand, eight hundred eight".