128514728 has 8 divisors (see below), whose sum is σ = 240965130. Its totient is φ = 64257360.

The previous prime is 128514721. The next prime is 128514733. The reversal of 128514728 is 827415821.

It can be written as a sum of positive squares in only one way, i.e., 107702884 + 20811844 = 10378^2 + 4562^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 128514691 and 128514700.

It is not an unprimeable number, because it can be changed into a prime (128514721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8032163 + ... + 8032178.

Almost surely, 2^128514728 is an apocalyptic number.

It is an amenable number.

128514728 is a deficient number, since it is larger than the sum of its proper divisors (112450402).

128514728 is a wasteful number, since it uses less digits than its factorization.

128514728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16064347 (or 16064343 counting only the distinct ones).

The product of its digits is 35840, while the sum is 38.

The square root of 128514728 is about 11336.4336543730. The cubic root of 128514728 is about 504.6430546278.

The spelling of 128514728 in words is "one hundred twenty-eight million, five hundred fourteen thousand, seven hundred twenty-eight".