256433246 has 4 divisors (see below), whose sum is σ = 384649872. Its totient is φ = 128216622.

The previous prime is 256433237. The next prime is 256433249. The reversal of 256433246 is 642334652.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256433249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64108310 + ... + 64108313.

It is an arithmetic number, because the mean of its divisors is an integer number (96162468).

Almost surely, 2^256433246 is an apocalyptic number.

256433246 is a deficient number, since it is larger than the sum of its proper divisors (128216626).

256433246 is a wasteful number, since it uses less digits than its factorization.

256433246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128216625.

The product of its digits is 103680, while the sum is 35.

The square root of 256433246 is about 16013.5332141286. The cubic root of 256433246 is about 635.3184143048.

Adding to 256433246 its reverse (642334652), we get a palindrome (898767898).

The spelling of 256433246 in words is "two hundred fifty-six million, four hundred thirty-three thousand, two hundred forty-six".