128307276 has 36 divisors (see below), whose sum is σ = 330456672. Its totient is φ = 41961504.

The previous prime is 128307253. The next prime is 128307299. The reversal of 128307276 is 672703821.

It is an interprime number because it is at equal distance from previous prime (128307253) and next prime (128307299).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 128307276.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31716 + ... + 35531.

It is an arithmetic number, because the mean of its divisors is an integer number (9179352).

Almost surely, 2^128307276 is an apocalyptic number.

It is an amenable number.

128307276 is an abundant number, since it is smaller than the sum of its proper divisors (202149396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128307276 is a wasteful number, since it uses less digits than its factorization.

128307276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67310 (or 67305 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 128307276 is about 11327.2801678073. The cubic root of 128307276 is about 504.3713721680.

The spelling of 128307276 in words is "one hundred twenty-eight million, three hundred seven thousand, two hundred seventy-six".