1720323360 has 672 divisors, whose sum is σ = 7271510400. Its totient is φ = 384072192.

The previous prime is 1720323349. The next prime is 1720323361. The reversal of 1720323360 is 633230271.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1720323361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 40007499 + ... + 40007541.

It is an arithmetic number, because the mean of its divisors is an integer number (10820700).

Almost surely, 2^1720323360 is an apocalyptic number.

1720323360 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 1720323360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3635755200).

1720323360 is an abundant number, since it is smaller than the sum of its proper divisors (5551187040).

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

1720323360 is an frugal number, since it uses more digits than its factorization.

1720323360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 27.

The square root of 1720323360 is about 41476.7809744199. The cubic root of 1720323360 is about 1198.2203620453.

The spelling of 1720323360 in words is "one billion, seven hundred twenty million, three hundred twenty-three thousand, three hundred sixty".