256430494 has 8 divisors (see below), whose sum is σ = 384737760. Its totient is φ = 128184576.

The previous prime is 256430477. The next prime is 256430497. The reversal of 256430494 is 494034652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256430497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2854 + ... + 22825.

It is an arithmetic number, because the mean of its divisors is an integer number (48092220).

Almost surely, 2^256430494 is an apocalyptic number.

256430494 is a deficient number, since it is larger than the sum of its proper divisors (128307266).

256430494 is a wasteful number, since it uses less digits than its factorization.

256430494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30674.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 256430494 is about 16013.4472865776. The cubic root of 256430494 is about 635.3161415853.

The spelling of 256430494 in words is "two hundred fifty-six million, four hundred thirty thousand, four hundred ninety-four".