128440203 has 4 divisors (see below), whose sum is σ = 171253608. Its totient is φ = 85626800.

The previous prime is 128440187. The next prime is 128440229. The reversal of 128440203 is 302044821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128440203 - 2⁴ = 128440187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128460203) 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, 21406698 + ... + 21406703.

It is an arithmetic number, because the mean of its divisors is an integer number (42813402).

Almost surely, 2^128440203 is an apocalyptic number.

128440203 is a deficient number, since it is larger than the sum of its proper divisors (42813405).

128440203 is an equidigital number, since it uses as much as digits as its factorization.

128440203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42813404.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 128440203 is about 11333.1462092395. The cubic root of 128440203 is about 504.5454891678.

The spelling of 128440203 in words is "one hundred twenty-eight million, four hundred forty thousand, two hundred three".