255489858 has 24 divisors (see below), whose sum is σ = 596143548. Its totient is φ = 78612192.

The previous prime is 255489851. The next prime is 255489863. The reversal of 255489858 is 858984552.

It is a happy number.

255489858 is a `hidden beast` number, since 2 + 5 + 548 + 98 + 5 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 247212729 + 8277129 = 15723^2 + 2877^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (255489851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 545685 + ... + 546152.

Almost surely, 2^255489858 is an apocalyptic number.

255489858 is an abundant number, since it is smaller than the sum of its proper divisors (340653690).

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

255489858 is a wasteful number, since it uses less digits than its factorization.

255489858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091858 (or 1091855 counting only the distinct ones).

The product of its digits is 4608000, while the sum is 54.

The square root of 255489858 is about 15984.0501125341. The cubic root of 255489858 is about 634.5383695106.

The spelling of 255489858 in words is "two hundred fifty-five million, four hundred eighty-nine thousand, eight hundred fifty-eight".