255987936 has 72 divisors (see below), whose sum is σ = 736805160. Its totient is φ = 84293376.

The previous prime is 255987923. The next prime is 255987937. The reversal of 255987936 is 639789552.

255987936 is a `hidden beast` number, since 2 + 559 + 87 + 9 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255987937) 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, 18550 + ... + 29258.

It is an arithmetic number, because the mean of its divisors is an integer number (10233405).

Almost surely, 2^255987936 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 255987936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (368402580).

255987936 is an abundant number, since it is smaller than the sum of its proper divisors (480817224).

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

255987936 is a wasteful number, since it uses less digits than its factorization.

255987936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10808 (or 10797 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 54.

The square root of 255987936 is about 15999.6229955584. The cubic root of 255987936 is about 634.9504464607.

The spelling of 255987936 in words is "two hundred fifty-five million, nine hundred eighty-seven thousand, nine hundred thirty-six".