128872763 has 8 divisors (see below), whose sum is σ = 138811200. Its totient is φ = 119249928.

The previous prime is 128872753. The next prime is 128872769. The reversal of 128872763 is 367278821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128872763 - 2²⁰ = 127824187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128872769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78053 + ... + 79686.

It is an arithmetic number, because the mean of its divisors is an integer number (17351400).

Almost surely, 2^128872763 is an apocalyptic number.

128872763 is a deficient number, since it is larger than the sum of its proper divisors (9938437).

128872763 is a wasteful number, since it uses less digits than its factorization.

128872763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157801.

The product of its digits is 225792, while the sum is 44.

The square root of 128872763 is about 11352.2140131342. The cubic root of 128872763 is about 505.1112560809. Note that the first 3 decimals are identical.

The spelling of 128872763 in words is "one hundred twenty-eight million, eight hundred seventy-two thousand, seven hundred sixty-three".