256433506 has 16 divisors (see below), whose sum is σ = 440386560. Its totient is φ = 109703520.

The previous prime is 256433497. The next prime is 256433531. The reversal of 256433506 is 605334652.

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, 8130 + ... + 24061.

It is an arithmetic number, because the mean of its divisors is an integer number (27524160).

Almost surely, 2^256433506 is an apocalyptic number.

256433506 is a deficient number, since it is larger than the sum of its proper divisors (183953054).

256433506 is a wasteful number, since it uses less digits than its factorization.

256433506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32769.

The product of its (nonzero) digits is 64800, while the sum is 34.

The square root of 256433506 is about 16013.5413322600. The cubic root of 256433506 is about 635.3186290231.

The spelling of 256433506 in words is "two hundred fifty-six million, four hundred thirty-three thousand, five hundred six".