256026240 has 96 divisors (see below), whose sum is σ = 884110500. Its totient is φ = 68272128.

The previous prime is 256026233. The next prime is 256026259. The reversal of 256026240 is 42620652.

256026240 is a `hidden beast` number, since 2 + 560 + 2 + 62 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 251666496 + 4359744 = 15864^2 + 2088^2 .

It is a tau number, because it is divible by the number of its divisors (96).

256026240 is a modest number, since divided by 26240 gives 2560 as remainder.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16465 + ... + 27984.

Almost surely, 2^256026240 is an apocalyptic number.

256026240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256026240 is an abundant number, since it is smaller than the sum of its proper divisors (628084260).

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

256026240 is a wasteful number, since it uses less digits than its factorization.

256026240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44474 (or 44459 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 256026240 is about 16000.8199789886. The cubic root of 256026240 is about 634.9821145271.

Adding to 256026240 its reverse (42620652), we get a palindrome (298646892).

The spelling of 256026240 in words is "two hundred fifty-six million, twenty-six thousand, two hundred forty".