255238428 has 24 divisors (see below), whose sum is σ = 601698832. Its totient is φ = 84201984.

The previous prime is 255238351. The next prime is 255238439. The reversal of 255238428 is 824832552.

255238428 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×255238428³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108475 + ... + 110802.

Almost surely, 2^255238428 is an apocalyptic number.

It is an amenable number.

255238428 is an abundant number, since it is smaller than the sum of its proper divisors (346460404).

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

255238428 is a wasteful number, since it uses less digits than its factorization.

255238428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219381 (or 219379 counting only the distinct ones).

The product of its digits is 153600, while the sum is 39.

The square root of 255238428 is about 15976.1831486748. The cubic root of 255238428 is about 634.3301494430.

The spelling of 255238428 in words is "two hundred fifty-five million, two hundred thirty-eight thousand, four hundred twenty-eight".