128328273 has 8 divisors (see below), whose sum is σ = 190116000. Its totient is φ = 85552164.

The previous prime is 128328271. The next prime is 128328281. The reversal of 128328273 is 372823821.

It is a happy number.

It is not a de Polignac number, because 128328273 - 2¹ = 128328271 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128328271) 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, 2376423 + ... + 2376476.

It is an arithmetic number, because the mean of its divisors is an integer number (23764500).

Almost surely, 2^128328273 is an apocalyptic number.

It is an amenable number.

128328273 is a deficient number, since it is larger than the sum of its proper divisors (61787727).

128328273 is an equidigital number, since it uses as much as digits as its factorization.

128328273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4752908 (or 4752902 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 128328273 is about 11328.2069631518. The cubic root of 128328273 is about 504.3988834892.

The spelling of 128328273 in words is "one hundred twenty-eight million, three hundred twenty-eight thousand, two hundred seventy-three".