256707834 has 8 divisors (see below), whose sum is σ = 513415680. Its totient is φ = 85569276.

The previous prime is 256707833. The next prime is 256707851. The reversal of 256707834 is 438707652.

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

256707834 is an admirable number.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (256707833) 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, 21392314 + ... + 21392325.

It is an arithmetic number, because the mean of its divisors is an integer number (64176960).

Almost surely, 2^256707834 is an apocalyptic number.

256707834 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256707834 is a wasteful number, since it uses less digits than its factorization.

256707834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42784644.

The product of its (nonzero) digits is 282240, while the sum is 42.

The square root of 256707834 is about 16022.1045434113. The cubic root of 256707834 is about 635.5450991378.

The spelling of 256707834 in words is "two hundred fifty-six million, seven hundred seven thousand, eight hundred thirty-four".