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255488 = 29499

255488 has 20 divisors (see below), whose sum is σ = 511500. Its totient is φ = 127488.

The previous prime is 255487. The next prime is 255499. The reversal of 255488 is 884552.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a nialpdrome in base 8.

It is a zygodrome in base 2.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 255488.

It is not an unprimeable number, because it can be changed into a prime (255487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263 + ... + 761.

It is an arithmetic number, because the mean of its divisors is an integer number (25575).

2255488 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 255488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255750).

255488 is an abundant number, since it is smaller than the sum of its proper divisors (256012).

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

255488 is an frugal number, since it uses more digits than its factorization.

255488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517 (or 501 counting only the distinct ones).

The product of its digits is 12800, while the sum is 32.

The square root of 255488 is about 505.4582079658. The cubic root of 255488 is about 63.4536831321.

The spelling of 255488 in words is "two hundred fifty-five thousand, four hundred eighty-eight".

Divisors: 1 2 4 8 16 32 64 128 256 499 512 998 1996 3992 7984 15968 31936 63872 127744 255488