256795728 has 40 divisors (see below), whose sum is σ = 758159808. Its totient is φ = 73370112.

The previous prime is 256795717. The next prime is 256795729. The reversal of 256795728 is 827597652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256795729) 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, 381801 + ... + 382472.

Almost surely, 2^256795728 is an apocalyptic number.

256795728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

256795728 is an abundant number, since it is smaller than the sum of its proper divisors (501364080).

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

256795728 is a wasteful number, since it uses less digits than its factorization.

256795728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764291 (or 764285 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 51.

The square root of 256795728 is about 16024.8472067599. The cubic root of 256795728 is about 635.6176254620.

The spelling of 256795728 in words is "two hundred fifty-six million, seven hundred ninety-five thousand, seven hundred twenty-eight".