1999028304 has 720 divisors, whose sum is σ = 7821166080. Its totient is φ = 470292480.

The previous prime is 1999028303. The next prime is 1999028309. The reversal of 1999028304 is 4038209991.

It is a super-2 number, since 2×1999028304² = 7992228320386232832, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1999028304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999028303) by changing a digit.

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 143 ways as a sum of consecutive naturals, for example, 54027774 + ... + 54027810.

Almost surely, 2^1999028304 is an apocalyptic number.

1999028304 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1999028304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3910583040).

1999028304 is an abundant number, since it is smaller than the sum of its proper divisors (5822137776).

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

1999028304 is a wasteful number, since it uses less digits than its factorization.

1999028304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 1999028304 is about 44710.4943385778. The cubic root of 1999028304 is about 1259.7169734672.

The spelling of 1999028304 in words is "one billion, nine hundred ninety-nine million, twenty-eight thousand, three hundred four".