256749706 has 8 divisors (see below), whose sum is σ = 387080100. Its totient is φ = 127723008.

The previous prime is 256749683. The next prime is 256749709. The reversal of 256749706 is 607947652.

256749706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 152893225 + 103856481 = 12365^2 + 10191^2 .

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

It is not an unprimeable number, because it can be changed into a prime (256749709) 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, 325431 + ... + 326218.

Almost surely, 2^256749706 is an apocalyptic number.

256749706 is a deficient number, since it is larger than the sum of its proper divisors (130330394).

256749706 is a wasteful number, since it uses less digits than its factorization.

256749706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651848.

The product of its (nonzero) digits is 635040, while the sum is 46.

The square root of 256749706 is about 16023.4111848882. The cubic root of 256749706 is about 635.5796521641.

The spelling of 256749706 in words is "two hundred fifty-six million, seven hundred forty-nine thousand, seven hundred six".