721311360 has 768 divisors, whose sum is σ = 3164676480. Its totient is φ = 137625600.

The previous prime is 721311323. The next prime is 721311373. The reversal of 721311360 is 63113127.

721311360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 721311360.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17592940 + ... + 17592980.

Almost surely, 2^721311360 is an apocalyptic number.

721311360 is a gapful number since it is divisible by the number (70) 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 721311360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1582338240).

721311360 is an abundant number, since it is smaller than the sum of its proper divisors (2443365120).

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

721311360 is a wasteful number, since it uses less digits than its factorization.

721311360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 721311360 is about 26857.2403645646. The cubic root of 721311360 is about 896.8247614136.

Adding to 721311360 its reverse (63113127), we get a palindrome (784424487).

The spelling of 721311360 in words is "seven hundred twenty-one million, three hundred eleven thousand, three hundred sixty".