128099718 has 20 divisors (see below), whose sum is σ = 287038620. Its totient is φ = 42699852.

The previous prime is 128099717. The next prime is 128099723. The reversal of 128099718 is 817990821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128099711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 395208 + ... + 395531.

It is an arithmetic number, because the mean of its divisors is an integer number (14351931).

Almost surely, 2^128099718 is an apocalyptic number.

128099718 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128099718 is an abundant number, since it is smaller than the sum of its proper divisors (158938902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128099718 is an equidigital number, since it uses as much as digits as its factorization.

128099718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790753 (or 790744 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The square root of 128099718 is about 11318.1145956383. The cubic root of 128099718 is about 504.0992576618.

The spelling of 128099718 in words is "one hundred twenty-eight million, ninety-nine thousand, seven hundred eighteen".