255866240 has 192 divisors, whose sum is σ = 732564000. Its totient is φ = 85155840.

The previous prime is 255866207. The next prime is 255866263. The reversal of 255866240 is 42668552.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 255866194 and 255866203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1285661 + ... + 1285859.

Almost surely, 2^255866240 is an apocalyptic number.

255866240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255866240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366282000).

255866240 is an abundant number, since it is smaller than the sum of its proper divisors (476697760).

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

255866240 is a wasteful number, since it uses less digits than its factorization.

255866240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 255866240 is about 15995.8194538448. The cubic root of 255866240 is about 634.8498125808.

The spelling of 255866240 in words is "two hundred fifty-five million, eight hundred sixty-six thousand, two hundred forty".