1919999828 has 12 divisors (see below), whose sum is σ = 3364274592. Its totient is φ = 958778520.

The previous prime is 1919999779. The next prime is 1919999857. The reversal of 1919999828 is 8289999191.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 301808 + ... + 308103.

It is an arithmetic number, because the mean of its divisors is an integer number (280356216).

Almost surely, 2^1919999828 is an apocalyptic number.

It is an amenable number.

1919999828 is a deficient number, since it is larger than the sum of its proper divisors (1444274764).

1919999828 is a wasteful number, since it uses less digits than its factorization.

1919999828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610702 (or 610700 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 65.

The square root of 1919999828 is about 43817.8026377407. The cubic root of 1919999828 is about 1242.8929652674.

The spelling of 1919999828 in words is "one billion, nine hundred nineteen million, nine hundred ninety-nine thousand, eight hundred twenty-eight".