256231738 has 8 divisors (see below), whose sum is σ = 439254432. Its totient is φ = 109813596.

The previous prime is 256231699. The next prime is 256231741. The reversal of 256231738 is 837132652.

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

It is a junction number, because it is equal to n+sod(n) for n = 256231697 and 256231706.

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, 9151120 + ... + 9151147.

It is an arithmetic number, because the mean of its divisors is an integer number (54906804).

Almost surely, 2^256231738 is an apocalyptic number.

256231738 is a deficient number, since it is larger than the sum of its proper divisors (183022694).

256231738 is a wasteful number, since it uses less digits than its factorization.

256231738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18302276.

The product of its digits is 60480, while the sum is 37.

The square root of 256231738 is about 16007.2401743711. The cubic root of 256231738 is about 635.1519573506.

The spelling of 256231738 in words is "two hundred fifty-six million, two hundred thirty-one thousand, seven hundred thirty-eight".