1999503360 has 288 divisors, whose sum is σ = 7172232480. Its totient is φ = 528482304.

The previous prime is 1999503301. The next prime is 1999503377. The reversal of 1999503360 is 633059991.

It is a tau number, because it is divible by the number of its divisors (288).

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 15 ways as a sum of consecutive naturals, for example, 17694664 + ... + 17694776.

It is an arithmetic number, because the mean of its divisors is an integer number (24903585).

Almost surely, 2^1999503360 is an apocalyptic number.

1999503360 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 1999503360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3586116240).

1999503360 is an abundant number, since it is smaller than the sum of its proper divisors (5172729120).

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

1999503360 is an frugal number, since it uses more digits than its factorization.

1999503360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 196830, while the sum is 45.

The square root of 1999503360 is about 44715.8066012456. The cubic root of 1999503360 is about 1259.8167533964.

The spelling of 1999503360 in words is "one billion, nine hundred ninety-nine million, five hundred three thousand, three hundred sixty".