256748698 has 8 divisors (see below), whose sum is σ = 395531892. Its totient is φ = 124904736.

The previous prime is 256748689. The next prime is 256748699. The reversal of 256748698 is 896847652.

It can be written as a sum of positive squares in 2 ways, for example, as 254625849 + 2122849 = 15957^2 + 1457^2 .

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 (256748699) 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, 1734715 + ... + 1734862.

Almost surely, 2^256748698 is an apocalyptic number.

256748698 is a deficient number, since it is larger than the sum of its proper divisors (138783194).

256748698 is a wasteful number, since it uses less digits than its factorization.

256748698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469616.

The product of its digits is 5806080, while the sum is 55.

The square root of 256748698 is about 16023.3797308807. The cubic root of 256748698 is about 635.5788204006.

The spelling of 256748698 in words is "two hundred fifty-six million, seven hundred forty-eight thousand, six hundred ninety-eight".