1799721144 has 192 divisors, whose sum is σ = 5441785440. Its totient is φ = 533744640.

The previous prime is 1799721139. The next prime is 1799721193. The reversal of 1799721144 is 4411279971.

It is a self number, because there is not a number n which added to its sum of digits gives 1799721144.

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, 5437059 + ... + 5437389.

Almost surely, 2^1799721144 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 1799721144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2720892720).

1799721144 is an abundant number, since it is smaller than the sum of its proper divisors (3642064296).

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

1799721144 is a wasteful number, since it uses less digits than its factorization.

1799721144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 543 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 1799721144 is about 42423.1203944264. The cubic root of 1799721144 is about 1216.3775788883.

The spelling of 1799721144 in words is "one billion, seven hundred ninety-nine million, seven hundred twenty-one thousand, one hundred forty-four".