255461688 has 80 divisors (see below), whose sum is σ = 753225000. Its totient is φ = 80668224.

The previous prime is 255461683. The next prime is 255461711. The reversal of 255461688 is 886164552.

255461688 is a `hidden beast` number, since 2 + 554 + 6 + 16 + 88 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255461683) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 1938 + ... + 22686.

Almost surely, 2^255461688 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 255461688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (376612500).

255461688 is an abundant number, since it is smaller than the sum of its proper divisors (497763312).

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

255461688 is a wasteful number, since it uses less digits than its factorization.

255461688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20786 (or 20773 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 255461688 is about 15983.1688973119. The cubic root of 255461688 is about 634.5150475113.

The spelling of 255461688 in words is "two hundred fifty-five million, four hundred sixty-one thousand, six hundred eighty-eight".