256648046 has 4 divisors (see below), whose sum is σ = 384972072. Its totient is φ = 128324022.

The previous prime is 256648033. The next prime is 256648061. The reversal of 256648046 is 640846652.

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

It is a junction number, because it is equal to n+sod(n) for n = 256647994 and 256648012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64162010 + ... + 64162013.

It is an arithmetic number, because the mean of its divisors is an integer number (96243018).

Almost surely, 2^256648046 is an apocalyptic number.

256648046 is a deficient number, since it is larger than the sum of its proper divisors (128324026).

256648046 is a wasteful number, since it uses less digits than its factorization.

256648046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128324025.

The product of its (nonzero) digits is 276480, while the sum is 41.

The square root of 256648046 is about 16020.2386374236. The cubic root of 256648046 is about 635.4957552071.

The spelling of 256648046 in words is "two hundred fifty-six million, six hundred forty-eight thousand, forty-six".