128726800 has 30 divisors (see below), whose sum is σ = 309267098. Its totient is φ = 51490560.

The previous prime is 128726797. The next prime is 128726833. The reversal of 128726800 is 8627821.

It can be written as a sum of positive squares in 3 ways, for example, as 33547264 + 95179536 = 5792^2 + 9756^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 160509 + ... + 161308.

Almost surely, 2^128726800 is an apocalyptic number.

128726800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128726800 is an abundant number, since it is smaller than the sum of its proper divisors (180540298).

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

128726800 is a wasteful number, since it uses less digits than its factorization.

128726800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321835 (or 321824 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 128726800 is about 11345.7833577061. The cubic root of 128726800 is about 504.9204854711.

The spelling of 128726800 in words is "one hundred twenty-eight million, seven hundred twenty-six thousand, eight hundred".