128504268 has 18 divisors (see below), whose sum is σ = 324830324. Its totient is φ = 42834744.

The previous prime is 128504237. The next prime is 128504273. The reversal of 128504268 is 862405821.

128504268 is a `hidden beast` number, since 128 + 504 + 26 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3569563 = 128504268 / (1 + 2 + 8 + 5 + 0 + 4 + 2 + 6 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1784746 + ... + 1784817.

Almost surely, 2^128504268 is an apocalyptic number.

128504268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

128504268 is an abundant number, since it is smaller than the sum of its proper divisors (196326056).

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

128504268 is a wasteful number, since it uses less digits than its factorization.

128504268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3569573 (or 3569568 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 128504268 is about 11335.9723006013. The cubic root of 128504268 is about 504.6293630464.

The spelling of 128504268 in words is "one hundred twenty-eight million, five hundred four thousand, two hundred sixty-eight".