128900268 has 48 divisors (see below), whose sum is σ = 381928960. Its totient is φ = 36828432.

The previous prime is 128900251. The next prime is 128900323. The reversal of 128900268 is 862009821.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 84496 + ... + 86007.

Almost surely, 2^128900268 is an apocalyptic number.

128900268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

128900268 is an abundant number, since it is smaller than the sum of its proper divisors (253028692).

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

128900268 is a wasteful number, since it uses less digits than its factorization.

128900268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170523 (or 170515 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 128900268 is about 11353.4253861995. The cubic root of 128900268 is about 505.1471884132.

The spelling of 128900268 in words is "one hundred twenty-eight million, nine hundred thousand, two hundred sixty-eight".