128164738 has 16 divisors (see below), whose sum is σ = 208116216. Its totient is φ = 58844160.

The previous prime is 128164703. The next prime is 128164739. The reversal of 128164738 is 837461821.

It can be written as a sum of positive squares in 4 ways, for example, as 68674369 + 59490369 = 8287^2 + 7713^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128164738.

It is not an unprimeable number, because it can be changed into a prime (128164739) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7753 + ... + 17788.

Almost surely, 2^128164738 is an apocalyptic number.

128164738 is a deficient number, since it is larger than the sum of its proper divisors (79951478).

128164738 is a wasteful number, since it uses less digits than its factorization.

128164738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25749.

The product of its digits is 64512, while the sum is 40.

The square root of 128164738 is about 11320.9866177820. The cubic root of 128164738 is about 504.1845323481.

It can be divided in two parts, 128 and 164738, that multiplied together give a square (21086464 = 4592²).

The spelling of 128164738 in words is "one hundred twenty-eight million, one hundred sixty-four thousand, seven hundred thirty-eight".