128727808 has 72 divisors (see below), whose sum is σ = 296911440. Its totient is φ = 55050240.

The previous prime is 128727787. The next prime is 128727811. The reversal of 128727808 is 808727821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46528 + ... + 49216.

It is an arithmetic number, because the mean of its divisors is an integer number (4123770).

Almost surely, 2^128727808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128727808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148455720).

128727808 is an abundant number, since it is smaller than the sum of its proper divisors (168183632).

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

128727808 is a wasteful number, since it uses less digits than its factorization.

128727808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2733 (or 2719 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 43.

The square root of 128727808 is about 11345.8277794086. The cubic root of 128727808 is about 504.9218034006.

The spelling of 128727808 in words is "one hundred twenty-eight million, seven hundred twenty-seven thousand, eight hundred eight".