1999826828 has 6 divisors (see below), whose sum is σ = 3499696956. Its totient is φ = 999913412.

The previous prime is 1999826813. The next prime is 1999826849. The reversal of 1999826828 is 8286289991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249978350 + ... + 249978357.

It is an arithmetic number, because the mean of its divisors is an integer number (583282826).

Almost surely, 2^1999826828 is an apocalyptic number.

It is an amenable number.

1999826828 is a deficient number, since it is larger than the sum of its proper divisors (1499870128).

1999826828 is a wasteful number, since it uses less digits than its factorization.

1999826828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499956711 (or 499956709 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 62.

The square root of 1999826828 is about 44719.4233862647. The cubic root of 1999826828 is about 1259.8846850039.

The spelling of 1999826828 in words is "one billion, nine hundred ninety-nine million, eight hundred twenty-six thousand, eight hundred twenty-eight".