256378269 has 8 divisors (see below), whose sum is σ = 390671680. Its totient is φ = 146501856.

The previous prime is 256378259. The next prime is 256378271. The reversal of 256378269 is 962873652.

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

It is not a de Polignac number, because 256378269 - 2⁵ = 256378237 is a prime.

It is a super-2 number, since 2×256378269² = 131459633630872722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256378249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6104224 + ... + 6104265.

It is an arithmetic number, because the mean of its divisors is an integer number (48833960).

Almost surely, 2^256378269 is an apocalyptic number.

It is an amenable number.

256378269 is a deficient number, since it is larger than the sum of its proper divisors (134293411).

256378269 is a wasteful number, since it uses less digits than its factorization.

256378269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12208499.

The product of its digits is 1088640, while the sum is 48.

The square root of 256378269 is about 16011.8165427911. The cubic root of 256378269 is about 635.2730088600.

The spelling of 256378269 in words is "two hundred fifty-six million, three hundred seventy-eight thousand, two hundred sixty-nine".