128774267 has 8 divisors (see below), whose sum is σ = 135656400. Its totient is φ = 121902624.

The previous prime is 128774231. The next prime is 128774273. The reversal of 128774267 is 762477821.

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 128774267 - 2¹⁰ = 128773243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128774227) 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, 43973 + ... + 46809.

It is an arithmetic number, because the mean of its divisors is an integer number (16957050).

Almost surely, 2^128774267 is an apocalyptic number.

128774267 is a deficient number, since it is larger than the sum of its proper divisors (6882133).

128774267 is a wasteful number, since it uses less digits than its factorization.

128774267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5245.

The product of its digits is 263424, while the sum is 44.

The square root of 128774267 is about 11347.8749993115. The cubic root of 128774267 is about 504.9825396701.

The spelling of 128774267 in words is "one hundred twenty-eight million, seven hundred seventy-four thousand, two hundred sixty-seven".