256803730 has 8 divisors (see below), whose sum is σ = 462246732. Its totient is φ = 102721488.

The previous prime is 256803727. The next prime is 256803793. The reversal of 256803730 is 37308652.

256803730 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 251888641 + 4915089 = 15871^2 + 2217^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12840177 + ... + 12840196.

Almost surely, 2^256803730 is an apocalyptic number.

256803730 is a deficient number, since it is larger than the sum of its proper divisors (205443002).

256803730 is a wasteful number, since it uses less digits than its factorization.

256803730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25680380.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 256803730 is about 16025.0968795824. The cubic root of 256803730 is about 635.6242275441.

The spelling of 256803730 in words is "two hundred fifty-six million, eight hundred three thousand, seven hundred thirty".