256312198 has 8 divisors (see below), whose sum is σ = 389735208. Its totient is φ = 126400464.

The previous prime is 256312163. The next prime is 256312211. The reversal of 256312198 is 891213652.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 877636 + ... + 877927.

It is an arithmetic number, because the mean of its divisors is an integer number (48716901).

Almost surely, 2^256312198 is an apocalyptic number.

256312198 is a deficient number, since it is larger than the sum of its proper divisors (133423010).

256312198 is a wasteful number, since it uses less digits than its factorization.

256312198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755638.

The product of its digits is 25920, while the sum is 37.

The square root of 256312198 is about 16009.7532148375. The cubic root of 256312198 is about 635.2184323037.

The spelling of 256312198 in words is "two hundred fifty-six million, three hundred twelve thousand, one hundred ninety-eight".