256355743 has 8 divisors (see below), whose sum is σ = 293273120. Its totient is φ = 219512160.

The previous prime is 256355731. The next prime is 256355747. The reversal of 256355743 is 347553652.

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

It is not a de Polignac number, because 256355743 - 2¹³ = 256347551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256355696 and 256355705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256355747) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10788 + ... + 25081.

It is an arithmetic number, because the mean of its divisors is an integer number (36659140).

Almost surely, 2^256355743 is an apocalyptic number.

256355743 is a deficient number, since it is larger than the sum of its proper divisors (36917377).

256355743 is a wasteful number, since it uses less digits than its factorization.

256355743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36897.

The product of its digits is 378000, while the sum is 40.

The square root of 256355743 is about 16011.1131093375. The cubic root of 256355743 is about 635.2544027862.

The spelling of 256355743 in words is "two hundred fifty-six million, three hundred fifty-five thousand, seven hundred forty-three".