256487512 has 16 divisors (see below), whose sum is σ = 482559840. Its totient is φ = 127804896.

The previous prime is 256487501. The next prime is 256487531. The reversal of 256487512 is 215784652.

It is a congruent number.

It is an unprimeable number.

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, 52368 + ... + 57055.

It is an arithmetic number, because the mean of its divisors is an integer number (30159990).

Almost surely, 2^256487512 is an apocalyptic number.

It is an amenable number.

256487512 is a deficient number, since it is larger than the sum of its proper divisors (226072328).

256487512 is a wasteful number, since it uses less digits than its factorization.

256487512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109722 (or 109718 counting only the distinct ones).

The product of its digits is 134400, while the sum is 40.

The square root of 256487512 is about 16015.2275038477. The cubic root of 256487512 is about 635.3632261717.

The spelling of 256487512 in words is "two hundred fifty-six million, four hundred eighty-seven thousand, five hundred twelve".