128027996 has 12 divisors (see below), whose sum is σ = 224186760. Its totient is φ = 63974640.

The previous prime is 128027993. The next prime is 128028001. The reversal of 128027996 is 699720821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128027993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1790 + ... + 16101.

It is an arithmetic number, because the mean of its divisors is an integer number (18682230).

Almost surely, 2^128027996 is an apocalyptic number.

It is an amenable number.

128027996 is a deficient number, since it is larger than the sum of its proper divisors (96158764).

128027996 is a wasteful number, since it uses less digits than its factorization.

128027996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19684 (or 19682 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 128027996 is about 11314.9456914295. The cubic root of 128027996 is about 504.0051597271.

The spelling of 128027996 in words is "one hundred twenty-eight million, twenty-seven thousand, nine hundred ninety-six".