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255880 = 2356397
BaseRepresentation
bin111110011110001000
3111000000001
4332132020
531142010
65252344
72114002
oct763610
9430001
10255880
11165279
121040b4
138c611
1469372
1550c3a
hex3e788

255880 has 16 divisors (see below), whose sum is σ = 575820. Its totient is φ = 102336.

The previous prime is 255877. The next prime is 255887. The reversal of 255880 is 88552.

It can be written as a sum of positive squares in 2 ways, for example, as 213444 + 42436 = 462^2 + 206^2 .

It is not an unprimeable number, because it can be changed into a prime (255887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3159 + ... + 3238.

2255880 is an apocalyptic number.

255880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255880 is an abundant number, since it is smaller than the sum of its proper divisors (319940).

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

255880 is a wasteful number, since it uses less digits than its factorization.

255880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6408 (or 6404 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 255880 is about 505.8458263147. The cubic root of 255880 is about 63.4861192716.

The spelling of 255880 in words is "two hundred fifty-five thousand, eight hundred eighty".

Divisors: 1 2 4 5 8 10 20 40 6397 12794 25588 31985 51176 63970 127940 255880