128028601 has 4 divisors (see below), whose sum is σ = 128111872. Its totient is φ = 127945332.

The previous prime is 128028577. The next prime is 128028613. The reversal of 128028601 is 106820821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128028601 - 2¹¹ = 128026553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128028601.

It is not an unprimeable number, because it can be changed into a prime (128028001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39285 + ... + 42418.

It is an arithmetic number, because the mean of its divisors is an integer number (32027968).

Almost surely, 2^128028601 is an apocalyptic number.

It is an amenable number.

128028601 is a deficient number, since it is larger than the sum of its proper divisors (83271).

128028601 is an equidigital number, since it uses as much as digits as its factorization.

128028601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83270.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 128028601 is about 11314.9724259496. The cubic root of 128028601 is about 504.0059536229.

The spelling of 128028601 in words is "one hundred twenty-eight million, twenty-eight thousand, six hundred one".