128228767 has 2 divisors, whose sum is σ = 128228768. Its totient is φ = 128228766.

The previous prime is 128228761. The next prime is 128228809. The reversal of 128228767 is 767822821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128228767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128228761) 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 as a sum of consecutive naturals, namely, 64114383 + 64114384.

It is an arithmetic number, because the mean of its divisors is an integer number (64114384).

Almost surely, 2^128228767 is an apocalyptic number.

128228767 is a deficient number, since it is larger than the sum of its proper divisors (1).

128228767 is an equidigital number, since it uses as much as digits as its factorization.

128228767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150528, while the sum is 43.

The square root of 128228767 is about 11323.8141542503. The cubic root of 128228767 is about 504.2684791432.

The spelling of 128228767 in words is "one hundred twenty-eight million, two hundred twenty-eight thousand, seven hundred sixty-seven".