256283642 has 8 divisors (see below), whose sum is σ = 386150016. Its totient is φ = 127566972.

The previous prime is 256283639. The next prime is 256283683. The reversal of 256283642 is 246382652.

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

It is a junction number, because it is equal to n+sod(n) for n = 256283596 and 256283605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286868 + ... + 287759.

It is an arithmetic number, because the mean of its divisors is an integer number (48268752).

Almost surely, 2^256283642 is an apocalyptic number.

256283642 is a deficient number, since it is larger than the sum of its proper divisors (129866374).

256283642 is a wasteful number, since it uses less digits than its factorization.

256283642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574852.

The product of its digits is 138240, while the sum is 38.

The square root of 256283642 is about 16008.8613586351. The cubic root of 256283642 is about 635.1948413192.

The spelling of 256283642 in words is "two hundred fifty-six million, two hundred eighty-three thousand, six hundred forty-two".