999999256 has 8 divisors (see below), whose sum is σ = 1874998620. Its totient is φ = 499999624.

The previous prime is 999999229. The next prime is 999999323. The reversal of 999999256 is 652999999.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 999999191 and 999999200.

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, 62499946 + ... + 62499961.

Almost surely, 2^999999256 is an apocalyptic number.

It is an amenable number.

999999256 is a deficient number, since it is larger than the sum of its proper divisors (874999364).

999999256 is a wasteful number, since it uses less digits than its factorization.

999999256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124999913 (or 124999909 counting only the distinct ones).

The product of its digits is 31886460, while the sum is 67.

The square root of 999999256 is about 31622.7648380087. The cubic root of 999999256 is about 999.9997519999. Note that the first 3 decimals are identical.

The spelling of 999999256 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, two hundred fifty-six".