128603769 has 16 divisors (see below), whose sum is σ = 198331392. Its totient is φ = 72601488.

The previous prime is 128603747. The next prime is 128603809. The reversal of 128603769 is 967306821.

It is a happy number.

It is not a de Polignac number, because 128603769 - 2⁵ = 128603737 is a prime.

It is a super-2 number, since 2×128603769² = 33077858802010722, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 128603769.

It is not an unprimeable number, because it can be changed into a prime (128603729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35149 + ... + 38634.

It is an arithmetic number, because the mean of its divisors is an integer number (12395712).

Almost surely, 2^128603769 is an apocalyptic number.

It is an amenable number.

128603769 is a deficient number, since it is larger than the sum of its proper divisors (69727623).

128603769 is an equidigital number, since it uses as much as digits as its factorization.

128603769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73876.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 128603769 is about 11340.3601794652. The cubic root of 128603769 is about 504.7595744733.

The spelling of 128603769 in words is "one hundred twenty-eight million, six hundred three thousand, seven hundred sixty-nine".