128269267 has 8 divisors (see below), whose sum is σ = 155216736. Its totient is φ = 103477632.

The previous prime is 128269259. The next prime is 128269303. The reversal of 128269267 is 762962821.

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

It is a cyclic number.

It is not a de Polignac number, because 128269267 - 2³ = 128269259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128269217) 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, 538828 + ... + 539065.

It is an arithmetic number, because the mean of its divisors is an integer number (19402092).

Almost surely, 2^128269267 is an apocalyptic number.

128269267 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

128269267 is a deficient number, since it is larger than the sum of its proper divisors (26947469).

128269267 is a wasteful number, since it uses less digits than its factorization.

128269267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077917.

The product of its digits is 145152, while the sum is 43.

The square root of 128269267 is about 11325.6022797907. The cubic root of 128269267 is about 504.3215632369.

The spelling of 128269267 in words is "one hundred twenty-eight million, two hundred sixty-nine thousand, two hundred sixty-seven".