128772763 has 8 divisors (see below), whose sum is σ = 148598528. Its totient is φ = 109304424.

The previous prime is 128772719. The next prime is 128772781. The reversal of 128772763 is 367277821.

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

It is not a de Polignac number, because 128772763 - 2⁹ = 128772251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128772463) 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, 88581 + ... + 90022.

It is an arithmetic number, because the mean of its divisors is an integer number (18574816).

Almost surely, 2^128772763 is an apocalyptic number.

128772763 is a deficient number, since it is larger than the sum of its proper divisors (19825765).

128772763 is a wasteful number, since it uses less digits than its factorization.

128772763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178713.

The product of its digits is 197568, while the sum is 43.

The square root of 128772763 is about 11347.8087312045. The cubic root of 128772763 is about 504.9805737062.

The spelling of 128772763 in words is "one hundred twenty-eight million, seven hundred seventy-two thousand, seven hundred sixty-three".