999028 has 12 divisors (see below), whose sum is σ = 1824480. Its totient is φ = 477752.

The previous prime is 999023. The next prime is 999029. The reversal of 999028 is 820999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999023) by changing a digit.

999028 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5338 + ... + 5521.

It is an arithmetic number, because the mean of its divisors is an integer number (152040).

2⁹⁹⁹⁰²⁸ is an apocalyptic number.

It is an amenable number.

999028 is a deficient number, since it is larger than the sum of its proper divisors (825452).

999028 is a wasteful number, since it uses less digits than its factorization.

999028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10886 (or 10884 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 999028 is about 999.5138818446. The cubic root of 999028 is about 99.9675894967.

Subtracting from 999028 its sum of digits (37), we obtain a triangular number (998991 = T₁₄₁₃).

The spelling of 999028 in words is "nine hundred ninety-nine thousand, twenty-eight".