256349967 has 8 divisors (see below), whose sum is σ = 341883696. Its totient is φ = 170858112.

The previous prime is 256349963. The next prime is 256349969. The reversal of 256349967 is 769943652.

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

It is not a de Polignac number, because 256349967 - 2² = 256349963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256349963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8983 + ... + 24359.

It is an arithmetic number, because the mean of its divisors is an integer number (42735462).

Almost surely, 2^256349967 is an apocalyptic number.

256349967 is a deficient number, since it is larger than the sum of its proper divisors (85533729).

256349967 is a wasteful number, since it uses less digits than its factorization.

256349967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20937.

The product of its digits is 2449440, while the sum is 51.

The square root of 256349967 is about 16010.9327336042. The cubic root of 256349967 is about 635.2496317378.

The spelling of 256349967 in words is "two hundred fifty-six million, three hundred forty-nine thousand, nine hundred sixty-seven".