255285389 has 8 divisors (see below), whose sum is σ = 261515520. Its totient is φ = 249118816.

The previous prime is 255285361. The next prime is 255285391. The reversal of 255285389 is 983582552.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255285389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255285319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7709 + ... + 23874.

It is an arithmetic number, because the mean of its divisors is an integer number (32689440).

Almost surely, 2^255285389 is an apocalyptic number.

It is an amenable number.

255285389 is a deficient number, since it is larger than the sum of its proper divisors (6230131).

255285389 is a wasteful number, since it uses less digits than its factorization.

255285389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31779.

The product of its digits is 864000, while the sum is 47.

The square root of 255285389 is about 15977.6528000830. The cubic root of 255285389 is about 634.3690502617.

The spelling of 255285389 in words is "two hundred fifty-five million, two hundred eighty-five thousand, three hundred eighty-nine".