128268855 has 96 divisors (see below), whose sum is σ = 270047232. Its totient is φ = 55468800.

The previous prime is 128268841. The next prime is 128268863. The reversal of 128268855 is 558862821.

It is not a de Polignac number, because 128268855 - 2¹³ = 128260663 is a prime.

It is a super-2 number, since 2×128268855² = 32905798326022050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 128268855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 199164 + ... + 199806.

It is an arithmetic number, because the mean of its divisors is an integer number (2812992).

Almost surely, 2^128268855 is an apocalyptic number.

128268855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128268855 is an abundant number, since it is smaller than the sum of its proper divisors (141778377).

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

128268855 is a wasteful number, since it uses less digits than its factorization.

128268855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709 (or 706 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The square root of 128268855 is about 11325.5840908979. The cubic root of 128268855 is about 504.3210232772.

The spelling of 128268855 in words is "one hundred twenty-eight million, two hundred sixty-eight thousand, eight hundred fifty-five".