128267469 has 40 divisors (see below), whose sum is σ = 210133440. Its totient is φ = 77328000.

The previous prime is 128267449. The next prime is 128267479. The reversal of 128267469 is 964762821.

It is a happy number.

128267469 is a `hidden beast` number, since 128 + 2 + 67 + 469 = 666.

It is not a de Polignac number, because 128267469 - 2⁷ = 128267341 is a prime.

It is a super-2 number, since 2×128267469² = 32905087207331922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128267449) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 319669 + ... + 320069.

It is an arithmetic number, because the mean of its divisors is an integer number (5253336).

Almost surely, 2^128267469 is an apocalyptic number.

It is an amenable number.

128267469 is a deficient number, since it is larger than the sum of its proper divisors (81865971).

128267469 is a wasteful number, since it uses less digits than its factorization.

128267469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783 (or 774 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 128267469 is about 11325.5229018355. The cubic root of 128267469 is about 504.3192068023.

The spelling of 128267469 in words is "one hundred twenty-eight million, two hundred sixty-seven thousand, four hundred sixty-nine".