128855408 has 20 divisors (see below), whose sum is σ = 272353848. Its totient is φ = 58570560.

The previous prime is 128855401. The next prime is 128855443. The reversal of 128855408 is 804558821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128855401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365891 + ... + 366242.

Almost surely, 2^128855408 is an apocalyptic number.

It is an amenable number.

128855408 is an abundant number, since it is smaller than the sum of its proper divisors (143498440).

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

128855408 is a wasteful number, since it uses less digits than its factorization.

128855408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732152 (or 732146 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 41.

The square root of 128855408 is about 11351.4495990600. The cubic root of 128855408 is about 505.0885810041.

The spelling of 128855408 in words is "one hundred twenty-eight million, eight hundred fifty-five thousand, four hundred eight".