256768672 has 24 divisors (see below), whose sum is σ = 505957536. Its totient is φ = 128271552.

The previous prime is 256768637. The next prime is 256768747. The reversal of 256768672 is 276867652.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42853 + ... + 48475.

It is an arithmetic number, because the mean of its divisors is an integer number (21081564).

Almost surely, 2^256768672 is an apocalyptic number.

It is an amenable number.

256768672 is a deficient number, since it is larger than the sum of its proper divisors (249188864).

256768672 is a wasteful number, since it uses less digits than its factorization.

256768672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7060 (or 7052 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 49.

The square root of 256768672 is about 16024.0029955065. The cubic root of 256768672 is about 635.5953017853.

The spelling of 256768672 in words is "two hundred fifty-six million, seven hundred sixty-eight thousand, six hundred seventy-two".