128303279 has 24 divisors (see below), whose sum is σ = 147044160. Its totient is φ = 111715968.

The previous prime is 128303239. The next prime is 128303281. The reversal of 128303279 is 972303821.

It is not a de Polignac number, because 128303279 - 2¹⁶ = 128237743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128303209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 230069 + ... + 230625.

It is an arithmetic number, because the mean of its divisors is an integer number (6126840).

Almost surely, 2^128303279 is an apocalyptic number.

128303279 is a deficient number, since it is larger than the sum of its proper divisors (18740881).

128303279 is a wasteful number, since it uses less digits than its factorization.

128303279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 128303279 is about 11327.1037339648. The cubic root of 128303279 is about 504.3661347583.

The spelling of 128303279 in words is "one hundred twenty-eight million, three hundred three thousand, two hundred seventy-nine".