128378284 has 6 divisors (see below), whose sum is σ = 224662004. Its totient is φ = 64189140.

The previous prime is 128378281. The next prime is 128378293. The reversal of 128378284 is 482873821.

It is a self number, because there is not a number n which added to its sum of digits gives 128378284.

It is not an unprimeable number, because it can be changed into a prime (128378281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16047282 + ... + 16047289.

Almost surely, 2^128378284 is an apocalyptic number.

It is an amenable number.

128378284 is a deficient number, since it is larger than the sum of its proper divisors (96283720).

128378284 is a wasteful number, since it uses less digits than its factorization.

128378284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32094575 (or 32094573 counting only the distinct ones).

The product of its digits is 172032, while the sum is 43.

The square root of 128378284 is about 11330.4141142325. The cubic root of 128378284 is about 504.4643983229.

The spelling of 128378284 in words is "one hundred twenty-eight million, three hundred seventy-eight thousand, two hundred eighty-four".