255505128 has 32 divisors (see below), whose sum is σ = 656028960. Its totient is φ = 82866240.

The previous prime is 255505127. The next prime is 255505169. The reversal of 255505128 is 821505552.

It is not an unprimeable number, because it can be changed into a prime (255505127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142978 + ... + 144753.

It is an arithmetic number, because the mean of its divisors is an integer number (20500905).

Almost surely, 2^255505128 is an apocalyptic number.

It is an amenable number.

255505128 is an abundant number, since it is smaller than the sum of its proper divisors (400523832).

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

255505128 is a wasteful number, since it uses less digits than its factorization.

255505128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287777 (or 287773 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 33.

The square root of 255505128 is about 15984.5277690647. The cubic root of 255505128 is about 634.5510108576.

The spelling of 255505128 in words is "two hundred fifty-five million, five hundred five thousand, one hundred twenty-eight".