1999036800 has 384 divisors, whose sum is σ = 7751959200. Its totient is φ = 501350400.

The previous prime is 1999036771. The next prime is 1999036859. The reversal of 1999036800 is 86309991.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×1999036800² = 7992296255508480000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1468120 + ... + 1469480.

Almost surely, 2^1999036800 is an apocalyptic number.

1999036800 is a gapful number since it is divisible by the number (10) 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 1999036800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3875979600).

1999036800 is an abundant number, since it is smaller than the sum of its proper divisors (5752922400).

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

1999036800 is a wasteful number, since it uses less digits than its factorization.

1999036800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411 (or 1388 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 1999036800 is about 44710.5893497279. The cubic root of 1999036800 is about 1259.7187580909.

The spelling of 1999036800 in words is "one billion, nine hundred ninety-nine million, thirty-six thousand, eight hundred".