1801784560 has 80 divisors (see below), whose sum is σ = 4337150976. Its totient is φ = 695568384.

The previous prime is 1801784549. The next prime is 1801784561. The reversal of 1801784560 is 654871081.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801784561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373524 + ... + 378316.

Almost surely, 2^1801784560 is an apocalyptic number.

1801784560 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 1801784560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2168575488).

1801784560 is an abundant number, since it is smaller than the sum of its proper divisors (2535366416).

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

1801784560 is a wasteful number, since it uses less digits than its factorization.

1801784560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4970 (or 4964 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 1801784560 is about 42447.4329023558. The cubic root of 1801784560 is about 1216.8422683511.

The spelling of 1801784560 in words is "one billion, eight hundred one million, seven hundred eighty-four thousand, five hundred sixty".