128028057 has 8 divisors (see below), whose sum is σ = 173042784. Its totient is φ = 84182688.

The previous prime is 128028049. The next prime is 128028067. The reversal of 128028057 is 750820821.

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

It is not a de Polignac number, because 128028057 - 2³ = 128028049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128028067) 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, 292083 + ... + 292520.

It is an arithmetic number, because the mean of its divisors is an integer number (21630348).

Almost surely, 2^128028057 is an apocalyptic number.

It is an amenable number.

128028057 is a deficient number, since it is larger than the sum of its proper divisors (45014727).

128028057 is an equidigital number, since it uses as much as digits as its factorization.

128028057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584679.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 128028057 is about 11314.9483869791. The cubic root of 128028057 is about 504.0052397729.

Adding to 128028057 its reverse (750820821), we get a palindrome (878848878).

The spelling of 128028057 in words is "one hundred twenty-eight million, twenty-eight thousand, fifty-seven".