128318966 has 16 divisors (see below), whose sum is σ = 197286144. Its totient is φ = 62562024.

The previous prime is 128318963. The next prime is 128318969. The reversal of 128318966 is 669813821.

It is an interprime number because it is at equal distance from previous prime (128318963) and next prime (128318969).

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128318963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82391 + ... + 83933.

It is an arithmetic number, because the mean of its divisors is an integer number (12330384).

Almost surely, 2^128318966 is an apocalyptic number.

128318966 is a deficient number, since it is larger than the sum of its proper divisors (68967178).

128318966 is a wasteful number, since it uses less digits than its factorization.

128318966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555.

The product of its digits is 124416, while the sum is 44.

The square root of 128318966 is about 11327.7961669515. The cubic root of 128318966 is about 504.3866893619.

The spelling of 128318966 in words is "one hundred twenty-eight million, three hundred eighteen thousand, nine hundred sixty-six".