128318644 has 12 divisors (see below), whose sum is σ = 224791168. Its totient is φ = 64092600.

The previous prime is 128318639. The next prime is 128318657. The reversal of 128318644 is 446813821.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12222 + ... + 20149.

Almost surely, 2^128318644 is an apocalyptic number.

It is an amenable number.

128318644 is a deficient number, since it is larger than the sum of its proper divisors (96472524).

128318644 is a wasteful number, since it uses less digits than its factorization.

128318644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33366 (or 33364 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The square root of 128318644 is about 11327.7819541162. The cubic root of 128318644 is about 504.3862674636.

The spelling of 128318644 in words is "one hundred twenty-eight million, three hundred eighteen thousand, six hundred forty-four".