255898409 has 8 divisors (see below), whose sum is σ = 281447040. Its totient is φ = 231187536.

The previous prime is 255898381. The next prime is 255898421. The reversal of 255898409 is 904898552.

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

It is a cyclic number.

It is not a de Polignac number, because 255898409 - 2¹⁶ = 255832873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255898429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208799 + ... + 210020.

It is an arithmetic number, because the mean of its divisors is an integer number (35180880).

Almost surely, 2^255898409 is an apocalyptic number.

It is an amenable number.

255898409 is a deficient number, since it is larger than the sum of its proper divisors (25548631).

255898409 is a wasteful number, since it uses less digits than its factorization.

255898409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418879.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The square root of 255898409 is about 15996.8249662238. The cubic root of 255898409 is about 634.8764171429.

The spelling of 255898409 in words is "two hundred fifty-five million, eight hundred ninety-eight thousand, four hundred nine".