128312808 has 32 divisors (see below), whose sum is σ = 345458400. Its totient is φ = 39480768.

The previous prime is 128312783. The next prime is 128312819. The reversal of 128312808 is 808213821.

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, 205318 + ... + 205941.

It is an arithmetic number, because the mean of its divisors is an integer number (10795575).

Almost surely, 2^128312808 is an apocalyptic number.

It is an amenable number.

128312808 is an abundant number, since it is smaller than the sum of its proper divisors (217145592).

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

128312808 is a wasteful number, since it uses less digits than its factorization.

128312808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411281 (or 411277 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 128312808 is about 11327.5243544210. The cubic root of 128312808 is about 504.3786207627.

The spelling of 128312808 in words is "one hundred twenty-eight million, three hundred twelve thousand, eight hundred eight".