128718807 has 16 divisors (see below), whose sum is σ = 198508800. Its totient is φ = 72666432.

The previous prime is 128718797. The next prime is 128718809. The reversal of 128718807 is 708817821.

It is not a de Polignac number, because 128718807 - 2²⁴ = 111941591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128718809) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 35182 + ... + 38667.

It is an arithmetic number, because the mean of its divisors is an integer number (12406800).

Almost surely, 2^128718807 is an apocalyptic number.

128718807 is a deficient number, since it is larger than the sum of its proper divisors (69789993).

128718807 is an equidigital number, since it uses as much as digits as its factorization.

128718807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73942.

The product of its (nonzero) digits is 50176, while the sum is 42.

The square root of 128718807 is about 11345.4311068377. The cubic root of 128718807 is about 504.9100346223.

The spelling of 128718807 in words is "one hundred twenty-eight million, seven hundred eighteen thousand, eight hundred seven".