128213648 has 20 divisors (see below), whose sum is σ = 250696380. Its totient is φ = 63517824.

The previous prime is 128213641. The next prime is 128213651. The reversal of 128213648 is 846312821.

It can be written as a sum of positive squares in 2 ways, for example, as 107163904 + 21049744 = 10352^2 + 4588^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (128213641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35015 + ... + 38502.

It is an arithmetic number, because the mean of its divisors is an integer number (12534819).

Almost surely, 2^128213648 is an apocalyptic number.

It is an amenable number.

128213648 is a deficient number, since it is larger than the sum of its proper divisors (122482732).

128213648 is a wasteful number, since it uses less digits than its factorization.

128213648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73634 (or 73628 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 128213648 is about 11323.1465591504. The cubic root of 128213648 is about 504.2486595271.

The spelling of 128213648 in words is "one hundred twenty-eight million, two hundred thirteen thousand, six hundred forty-eight".