128318567 has 8 divisors (see below), whose sum is σ = 146318256. Its totient is φ = 111480192.

The previous prime is 128318551. The next prime is 128318599. The reversal of 128318567 is 765813821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128318567 - 2⁴ = 128318551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128318527) 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, 290093 + ... + 290534.

It is an arithmetic number, because the mean of its divisors is an integer number (18289782).

Almost surely, 2^128318567 is an apocalyptic number.

128318567 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

128318567 is a deficient number, since it is larger than the sum of its proper divisors (17999689).

128318567 is a wasteful number, since it uses less digits than its factorization.

128318567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580657.

The product of its digits is 80640, while the sum is 41.

The square root of 128318567 is about 11327.7785553921. The cubic root of 128318567 is about 504.3861665748.

The spelling of 128318567 in words is "one hundred twenty-eight million, three hundred eighteen thousand, five hundred sixty-seven".