256730367 has 4 divisors (see below), whose sum is σ = 342307160. Its totient is φ = 171153576.

The previous prime is 256730363. The next prime is 256730377. The reversal of 256730367 is 763037652.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 256730367 - 2² = 256730363 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256730363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42788392 + ... + 42788397.

It is an arithmetic number, because the mean of its divisors is an integer number (85576790).

Almost surely, 2^256730367 is an apocalyptic number.

256730367 is a deficient number, since it is larger than the sum of its proper divisors (85576793).

256730367 is an equidigital number, since it uses as much as digits as its factorization.

256730367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85576792.

The product of its (nonzero) digits is 158760, while the sum is 39.

The square root of 256730367 is about 16022.8077127575. The cubic root of 256730367 is about 635.5636939719.

The spelling of 256730367 in words is "two hundred fifty-six million, seven hundred thirty thousand, three hundred sixty-seven".