128395472 has 20 divisors (see below), whose sum is σ = 249167460. Its totient is φ = 64094208.

The previous prime is 128395469. The next prime is 128395481. The reversal of 128395472 is 274593821.

It can be written as a sum of positive squares in 2 ways, for example, as 67305616 + 61089856 = 8204^2 + 7816^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4304 + ... + 16592.

It is an arithmetic number, because the mean of its divisors is an integer number (12458373).

Almost surely, 2^128395472 is an apocalyptic number.

It is an amenable number.

128395472 is a deficient number, since it is larger than the sum of its proper divisors (120771988).

128395472 is a wasteful number, since it uses less digits than its factorization.

128395472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12950 (or 12944 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 128395472 is about 11331.1725783345. The cubic root of 128395472 is about 504.4869108197.

The spelling of 128395472 in words is "one hundred twenty-eight million, three hundred ninety-five thousand, four hundred seventy-two".