256512488 has 16 divisors (see below), whose sum is σ = 481222500. Its totient is φ = 128186496.

The previous prime is 256512481. The next prime is 256512517. The reversal of 256512488 is 884215652.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 252110884 + 4401604 = 15878^2 + 2098^2 .

It is not an unprimeable number, because it can be changed into a prime (256512481) 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 3 ways as a sum of consecutive naturals, for example, 9038 + ... + 24386.

Almost surely, 2^256512488 is an apocalyptic number.

It is an amenable number.

256512488 is a deficient number, since it is larger than the sum of its proper divisors (224710012).

256512488 is a wasteful number, since it uses less digits than its factorization.

256512488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17444 (or 17440 counting only the distinct ones).

The product of its digits is 153600, while the sum is 41.

The square root of 256512488 is about 16016.0072427556. The cubic root of 256512488 is about 635.3838487701.

The spelling of 256512488 in words is "two hundred fifty-six million, five hundred twelve thousand, four hundred eighty-eight".