256940016 has 40 divisors (see below), whose sum is σ = 664374144. Its totient is φ = 85567680.

The previous prime is 256940009. The next prime is 256940017. The reversal of 256940016 is 610049652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256940017) 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, 75471 + ... + 78801.

Almost surely, 2^256940016 is an apocalyptic number.

It is an amenable number.

256940016 is an abundant number, since it is smaller than the sum of its proper divisors (407434128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256940016 is a wasteful number, since it uses less digits than its factorization.

256940016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4949 (or 4943 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 256940016 is about 16029.3485831459. The cubic root of 256940016 is about 635.7366497997.

Adding to 256940016 its reverse (610049652), we get a palindrome (866989668).

The spelling of 256940016 in words is "two hundred fifty-six million, nine hundred forty thousand, sixteen".