255428 has 6 divisors (see below), whose sum is σ = 447006. Its totient is φ = 127712.

The previous prime is 255419. The next prime is 255443. The reversal of 255428 is 824552.

It can be written as a sum of positive squares in only one way, i.e., 232324 + 23104 = 482^2 + 152^2 .

It is a junction number, because it is equal to n+sod(n) for n = 255397 and 255406.

It is an unprimeable number.

255428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31925 + ... + 31932.

It is an arithmetic number, because the mean of its divisors is an integer number (74501).

2²⁵⁵⁴²⁸ is an apocalyptic number.

It is an amenable number.

255428 is a deficient number, since it is larger than the sum of its proper divisors (191578).

255428 is a wasteful number, since it uses less digits than its factorization.

255428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63861 (or 63859 counting only the distinct ones).

The product of its digits is 3200, while the sum is 26.

The square root of 255428 is about 505.3988523928. The cubic root of 255428 is about 63.4487154898.

The spelling of 255428 in words is "two hundred fifty-five thousand, four hundred twenty-eight".