256348766 has 16 divisors (see below), whose sum is σ = 391080960. Its totient is φ = 125999160.

The previous prime is 256348751. The next prime is 256348789. The reversal of 256348766 is 667843652.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 256348766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49655 + ... + 54573.

It is an arithmetic number, because the mean of its divisors is an integer number (24442560).

Almost surely, 2^256348766 is an apocalyptic number.

256348766 is a deficient number, since it is larger than the sum of its proper divisors (134732194).

256348766 is a wasteful number, since it uses less digits than its factorization.

256348766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5359.

The product of its digits is 1451520, while the sum is 47.

The square root of 256348766 is about 16010.8952279378. The cubic root of 256348766 is about 635.2486396878.

The spelling of 256348766 in words is "two hundred fifty-six million, three hundred forty-eight thousand, seven hundred sixty-six".