999856028 has 6 divisors (see below), whose sum is σ = 1749748056. Its totient is φ = 499928012.

The previous prime is 999856021. The next prime is 999856031. The reversal of 999856028 is 820658999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999856021) by changing a digit.

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 as a sum of consecutive naturals, namely, 124982000 + ... + 124982007.

It is an arithmetic number, because the mean of its divisors is an integer number (291624676).

Almost surely, 2^999856028 is an apocalyptic number.

It is an amenable number.

999856028 is a deficient number, since it is larger than the sum of its proper divisors (749892028).

999856028 is a wasteful number, since it uses less digits than its factorization.

999856028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249964011 (or 249964009 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 56.

The square root of 999856028 is about 31620.5001225471. The cubic root of 999856028 is about 999.9520070300.

The spelling of 999856028 in words is "nine hundred ninety-nine million, eight hundred fifty-six thousand, twenty-eight".