256603838 has 8 divisors (see below), whose sum is σ = 385508160. Its totient is φ = 128101120.

The previous prime is 256603811. The next prime is 256603859. The reversal of 256603838 is 838306652.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 256603795 and 256603804.

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, 98798 + ... + 101361.

It is an arithmetic number, because the mean of its divisors is an integer number (48188520).

Almost surely, 2^256603838 is an apocalyptic number.

256603838 is a deficient number, since it is larger than the sum of its proper divisors (128904322).

256603838 is a wasteful number, since it uses less digits than its factorization.

256603838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200802.

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 256603838 is about 16018.8588232745. The cubic root of 256603838 is about 635.4592647552.

The spelling of 256603838 in words is "two hundred fifty-six million, six hundred three thousand, eight hundred thirty-eight".