720831360 has 128 divisors (see below), whose sum is σ = 2351352960. Its totient is φ = 187729920.

The previous prime is 720831341. The next prime is 720831361. The reversal of 720831360 is 63138027.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720831361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78195 + ... + 86925.

It is an arithmetic number, because the mean of its divisors is an integer number (18369945).

Almost surely, 2^720831360 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 720831360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1175676480).

720831360 is an abundant number, since it is smaller than the sum of its proper divisors (1630521600).

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

720831360 is a wasteful number, since it uses less digits than its factorization.

720831360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8796 (or 8784 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 720831360 is about 26848.3027396519. The cubic root of 720831360 is about 896.6257852007.

Adding to 720831360 its reverse (63138027), we get a palindrome (783969387).

The spelling of 720831360 in words is "seven hundred twenty million, eight hundred thirty-one thousand, three hundred sixty".