256748026 has 16 divisors (see below), whose sum is σ = 408591360. Its totient is φ = 120657600.

The previous prime is 256748021. The next prime is 256748029. The reversal of 256748026 is 620847652.

It is a self number, because there is not a number n which added to its sum of digits gives 256748026.

It is not an unprimeable number, because it can be changed into a prime (256748021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21775 + ... + 31426.

It is an arithmetic number, because the mean of its divisors is an integer number (25536960).

Almost surely, 2^256748026 is an apocalyptic number.

256748026 is a deficient number, since it is larger than the sum of its proper divisors (151843334).

256748026 is a wasteful number, since it uses less digits than its factorization.

256748026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53349.

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 256748026 is about 16023.3587615082. The cubic root of 256748026 is about 635.5782658904.

The spelling of 256748026 in words is "two hundred fifty-six million, seven hundred forty-eight thousand, twenty-six".