256374647 has 8 divisors (see below), whose sum is σ = 261262800. Its totient is φ = 251504704.

The previous prime is 256374641. The next prime is 256374653. The reversal of 256374647 is 746473652.

It is an interprime number because it is at equal distance from previous prime (256374641) and next prime (256374653).

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

It is a cyclic number.

It is not a de Polignac number, because 256374647 - 2⁴ = 256374631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256374598 and 256374607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256374641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25763 + ... + 34299.

It is an arithmetic number, because the mean of its divisors is an integer number (32657850).

Almost surely, 2^256374647 is an apocalyptic number.

256374647 is a deficient number, since it is larger than the sum of its proper divisors (4888153).

256374647 is an equidigital number, since it uses as much as digits as its factorization.

256374647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9105.

The product of its digits is 846720, while the sum is 44.

The square root of 256374647 is about 16011.7034384228. The cubic root of 256374647 is about 635.2700172262.

The spelling of 256374647 in words is "two hundred fifty-six million, three hundred seventy-four thousand, six hundred forty-seven".