999999028 has 12 divisors (see below), whose sum is σ = 1999998112. Its totient is φ = 428571000.

The previous prime is 999999017. The next prime is 999999029. The reversal of 999999028 is 820999999.

999999028 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999999029) 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, 17857098 + ... + 17857153.

Almost surely, 2^999999028 is an apocalyptic number.

It is an amenable number.

999999028 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999999028 is a wasteful number, since it uses less digits than its factorization.

999999028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35714262 (or 35714260 counting only the distinct ones).

The product of its (nonzero) digits is 8503056, while the sum is 64.

The square root of 999999028 is about 31622.7612330106. The cubic root of 999999028 is about 999.9996759999. Note that the first 3 decimals are identical.

The spelling of 999999028 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, twenty-eight".