256762646 has 48 divisors (see below), whose sum is σ = 465776640. Its totient is φ = 105734160.

The previous prime is 256762643. The next prime is 256762663. The reversal of 256762646 is 646267652.

It is a junction number, because it is equal to n+sod(n) for n = 256762597 and 256762606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256762643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 677285 + ... + 677663.

It is an arithmetic number, because the mean of its divisors is an integer number (9703680).

Almost surely, 2^256762646 is an apocalyptic number.

256762646 is a deficient number, since it is larger than the sum of its proper divisors (209013994).

256762646 is a wasteful number, since it uses less digits than its factorization.

256762646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 642 counting only the distinct ones).

The product of its digits is 725760, while the sum is 44.

The square root of 256762646 is about 16023.8149639841. The cubic root of 256762646 is about 635.5903295701.

The spelling of 256762646 in words is "two hundred fifty-six million, seven hundred sixty-two thousand, six hundred forty-six".