1999445204 has 24 divisors (see below), whose sum is σ = 3513888000. Its totient is φ = 995487840.

The previous prime is 1999445197. The next prime is 1999445233. The reversal of 1999445204 is 4025449991.

It is a super-2 number, since 2×1999445204² = 7995562247597203232, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1428497 + ... + 1429895.

It is an arithmetic number, because the mean of its divisors is an integer number (146412000).

Almost surely, 2^1999445204 is an apocalyptic number.

It is an amenable number.

1999445204 is a deficient number, since it is larger than the sum of its proper divisors (1514442796).

1999445204 is a wasteful number, since it uses less digits than its factorization.

1999445204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663 (or 2661 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 1999445204 is about 44715.1563119263. The cubic root of 1999445204 is about 1259.8045392611.

The spelling of 1999445204 in words is "one billion, nine hundred ninety-nine million, four hundred forty-five thousand, two hundred four".