128408472328 has 16 divisors (see below), whose sum is σ = 240857785260. Its totient is φ = 64179729600.

The previous prime is 128408472317. The next prime is 128408472329. The reversal of 128408472328 is 823274804821.

It can be written as a sum of positive squares in 2 ways, for example, as 123525537444 + 4882934884 = 351462^2 + 69878^2 .

It is a super-2 number, since 2×128408472328² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128408472329) 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, 3041043 + ... + 3082978.

Almost surely, 2^128408472328 is an apocalyptic number.

It is an amenable number.

128408472328 is a deficient number, since it is larger than the sum of its proper divisors (112449312932).

128408472328 is a wasteful number, since it uses less digits than its factorization.

128408472328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6126648 (or 6126644 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 49.

The spelling of 128408472328 in words is "one hundred twenty-eight billion, four hundred eight million, four hundred seventy-two thousand, three hundred twenty-eight".