128819788 has 12 divisors (see below), whose sum is σ = 225516312. Its totient is φ = 64386560.

The previous prime is 128819777. The next prime is 128819807. The reversal of 128819788 is 887918821.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14331 + ... + 21517.

It is an arithmetic number, because the mean of its divisors is an integer number (18793026).

Almost surely, 2^128819788 is an apocalyptic number.

It is an amenable number.

128819788 is a deficient number, since it is larger than the sum of its proper divisors (96696524).

128819788 is a wasteful number, since it uses less digits than its factorization.

128819788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11672 (or 11670 counting only the distinct ones).

The product of its digits is 516096, while the sum is 52.

The square root of 128819788 is about 11349.8805280056. The cubic root of 128819788 is about 505.0420355167.

The spelling of 128819788 in words is "one hundred twenty-eight million, eight hundred nineteen thousand, seven hundred eighty-eight".