256593694 has 24 divisors (see below), whose sum is σ = 455080248. Its totient is φ = 108163440.

The previous prime is 256593679. The next prime is 256593697. The reversal of 256593694 is 496395652.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256593697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15484 + ... + 27439.

It is an arithmetic number, because the mean of its divisors is an integer number (18961677).

Almost surely, 2^256593694 is an apocalyptic number.

256593694 is a deficient number, since it is larger than the sum of its proper divisors (198486554).

256593694 is a wasteful number, since it uses less digits than its factorization.

256593694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43000 (or 42993 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 49.

The square root of 256593694 is about 16018.5421933458. The cubic root of 256593694 is about 635.4508910382.

The spelling of 256593694 in words is "two hundred fifty-six million, five hundred ninety-three thousand, six hundred ninety-four".