1899313344 has 84 divisors (see below), whose sum is σ = 5495095944. Its totient is φ = 627167232.

The previous prime is 1899313291. The next prime is 1899313349. The reversal of 1899313344 is 4433139981.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1899313344.

It is not an unprimeable number, because it can be changed into a prime (1899313349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46224 + ... + 77040.

Almost surely, 2^1899313344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1899313344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2747547972).

1899313344 is an abundant number, since it is smaller than the sum of its proper divisors (3595782600).

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

1899313344 is a wasteful number, since it uses less digits than its factorization.

1899313344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30942 (or 30929 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 1899313344 is about 43581.1122391341. The cubic root of 1899313344 is about 1238.4131070463.

The spelling of 1899313344 in words is "one billion, eight hundred ninety-nine million, three hundred thirteen thousand, three hundred forty-four".