1788180720 has 80 divisors (see below), whose sum is σ = 5557218720. Its totient is φ = 475656192.

The previous prime is 1788180707. The next prime is 1788180731. The reversal of 1788180720 is 270818871.

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

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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, 89052 + ... + 107268.

It is an arithmetic number, because the mean of its divisors is an integer number (69465234).

Almost surely, 2^1788180720 is an apocalyptic number.

1788180720 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 1788180720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2778609360).

1788180720 is an abundant number, since it is smaller than the sum of its proper divisors (3769038000).

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

1788180720 is a wasteful number, since it uses less digits than its factorization.

1788180720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18642 (or 18636 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 42.

The square root of 1788180720 is about 42286.8859104096. The cubic root of 1788180720 is about 1213.7720595399.

The spelling of 1788180720 in words is "one billion, seven hundred eighty-eight million, one hundred eighty thousand, seven hundred twenty".