256434946 has 4 divisors (see below), whose sum is σ = 384652422. Its totient is φ = 128217472.

The previous prime is 256434943. The next prime is 256434947. The reversal of 256434946 is 649434652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 255200625 + 1234321 = 15975^2 + 1111^2 .

It is not an unprimeable number, because it can be changed into a prime (256434943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64108735 + ... + 64108738.

Almost surely, 2^256434946 is an apocalyptic number.

256434946 is a deficient number, since it is larger than the sum of its proper divisors (128217476).

256434946 is a wasteful number, since it uses less digits than its factorization.

256434946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128217475.

The product of its digits is 622080, while the sum is 43.

The square root of 256434946 is about 16013.5862941441. The cubic root of 256434946 is about 635.3198182296.

The spelling of 256434946 in words is "two hundred fifty-six million, four hundred thirty-four thousand, nine hundred forty-six".