128605603 has 8 divisors (see below), whose sum is σ = 147416672. Its totient is φ = 109904256.

The previous prime is 128605567. The next prime is 128605619. The reversal of 128605603 is 306506821.

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

It is not a de Polignac number, because 128605603 - 2¹³ = 128597411 is a prime.

It is a super-2 number, since 2×128605603² = 33078802245987218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128605693) 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, 24900 + ... + 29617.

It is an arithmetic number, because the mean of its divisors is an integer number (18427084).

Almost surely, 2^128605603 is an apocalyptic number.

128605603 is a deficient number, since it is larger than the sum of its proper divisors (18811069).

128605603 is an equidigital number, since it uses as much as digits as its factorization.

128605603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54861.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 128605603 is about 11340.4410408061. The cubic root of 128605603 is about 504.7619738967.

The spelling of 128605603 in words is "one hundred twenty-eight million, six hundred five thousand, six hundred three".