1999398828002 has 8 divisors (see below), whose sum is σ = 2999332933212. Its totient is φ = 999621183600.

The previous prime is 1999398827999. The next prime is 1999398828013. The reversal of 1999398828002 is 2008288939991.

It is a Cunningham number, because it is equal to 1414001²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 1999398828001 + 1 = 1414001^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39083249 + ... + 39134372.

Almost surely, 2^{1999398828002} is an apocalyptic number.

1999398828002 is a deficient number, since it is larger than the sum of its proper divisors (999934105210).

1999398828002 is a wasteful number, since it uses less digits than its factorization.

1999398828002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78230404.

The product of its (nonzero) digits is 40310784, while the sum is 68.

The spelling of 1999398828002 in words is "one trillion, nine hundred ninety-nine billion, three hundred ninety-eight million, eight hundred twenty-eight thousand, two".