256320799 has 8 divisors (see below), whose sum is σ = 293378720. Its totient is φ = 219373056.

The previous prime is 256320787. The next prime is 256320829. The reversal of 256320799 is 997023652.

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

It is not a de Polignac number, because 256320799 - 2⁵ = 256320767 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 (256320599) 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, 22494 + ... + 31915.

It is an arithmetic number, because the mean of its divisors is an integer number (36672340).

Almost surely, 2^256320799 is an apocalyptic number.

256320799 is a deficient number, since it is larger than the sum of its proper divisors (37057921).

256320799 is an equidigital number, since it uses as much as digits as its factorization.

256320799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55089.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 256320799 is about 16010.0218300913. The cubic root of 256320799 is about 635.2255375093.

The spelling of 256320799 in words is "two hundred fifty-six million, three hundred twenty thousand, seven hundred ninety-nine".