256144460 has 48 divisors (see below), whose sum is σ = 631949472. Its totient is φ = 85977600.

The previous prime is 256144459. The next prime is 256144463. The reversal of 256144460 is 64441652.

It is not an unprimeable number, because it can be changed into a prime (256144463) 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 15 ways as a sum of consecutive naturals, for example, 41921 + ... + 47640.

It is an arithmetic number, because the mean of its divisors is an integer number (13165614).

Almost surely, 2^256144460 is an apocalyptic number.

256144460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256144460 is an abundant number, since it is smaller than the sum of its proper divisors (375805012).

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

256144460 is a wasteful number, since it uses less digits than its factorization.

256144460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89594 (or 89592 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 256144460 is about 16004.5137383177. The cubic root of 256144460 is about 635.0798337224.

The spelling of 256144460 in words is "two hundred fifty-six million, one hundred forty-four thousand, four hundred sixty".