128423268 has 36 divisors (see below), whose sum is σ = 324979200. Its totient is φ = 42761136.

The previous prime is 128423233. The next prime is 128423291. The reversal of 128423268 is 862324821.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52333 + ... + 54731.

It is an arithmetic number, because the mean of its divisors is an integer number (9027200).

Almost surely, 2^128423268 is an apocalyptic number.

128423268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

128423268 is an abundant number, since it is smaller than the sum of its proper divisors (196555932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128423268 is a wasteful number, since it uses less digits than its factorization.

128423268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3896 (or 3891 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 128423268 is about 11332.3990399209. The cubic root of 128423268 is about 504.5233132104.

It can be divided in two parts, 12842 and 3268, that added together give a triangular number (16110 = T₁₇₉).

The spelling of 128423268 in words is "one hundred twenty-eight million, four hundred twenty-three thousand, two hundred sixty-eight".