256241686 has 8 divisors (see below), whose sum is σ = 386056440. Its totient is φ = 127556208.

The previous prime is 256241681. The next prime is 256241719. The reversal of 256241686 is 686142652.

256241686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256241681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281751 + ... + 282658.

It is an arithmetic number, because the mean of its divisors is an integer number (48257055).

Almost surely, 2^256241686 is an apocalyptic number.

256241686 is a deficient number, since it is larger than the sum of its proper divisors (129814754).

256241686 is a wasteful number, since it uses less digits than its factorization.

256241686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564638.

The product of its digits is 138240, while the sum is 40.

The square root of 256241686 is about 16007.5509057445. The cubic root of 256241686 is about 635.1601770062.

The spelling of 256241686 in words is "two hundred fifty-six million, two hundred forty-one thousand, six hundred eighty-six".