255999998 has 8 divisors (see below), whose sum is σ = 384072192. Its totient is φ = 127975936.

The previous prime is 255999983. The next prime is 256000001. The reversal of 255999998 is 899999552.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7811 + ... + 23937.

It is an arithmetic number, because the mean of its divisors is an integer number (48009024).

Almost surely, 2^255999998 is an apocalyptic number.

255999998 is a deficient number, since it is larger than the sum of its proper divisors (128072194).

255999998 is a wasteful number, since it uses less digits than its factorization.

255999998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24066.

The product of its digits is 23619600, while the sum is 65.

The square root of 255999998 is about 15999.9999375000. Note that the first 4 decimals coincide. The cubic root of 255999998 is about 634.9604191337.

The spelling of 255999998 in words is "two hundred fifty-five million, nine hundred ninety-nine thousand, nine hundred ninety-eight".