128508303 has 16 divisors (see below), whose sum is σ = 213624576. Its totient is φ = 66757440.

The previous prime is 128508301. The next prime is 128508307. The reversal of 128508303 is 303805821.

It is a happy number.

It is not a de Polignac number, because 128508303 - 2¹ = 128508301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128508301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277926 + ... + 278387.

It is an arithmetic number, because the mean of its divisors is an integer number (13351536).

Almost surely, 2^128508303 is an apocalyptic number.

128508303 is a deficient number, since it is larger than the sum of its proper divisors (85116273).

128508303 is a wasteful number, since it uses less digits than its factorization.

128508303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556334.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 128508303 is about 11336.1502724690. The cubic root of 128508303 is about 504.6346447339.

The spelling of 128508303 in words is "one hundred twenty-eight million, five hundred eight thousand, three hundred three".