720023040 has 320 divisors, whose sum is σ = 2793035520. Its totient is φ = 174366720.

The previous prime is 720023023. The next prime is 720023047. The reversal of 720023040 is 40320027.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720023047) 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 31 ways as a sum of consecutive naturals, for example, 759847 + ... + 760793.

It is an arithmetic number, because the mean of its divisors is an integer number (8728236).

Almost surely, 2^720023040 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 720023040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1396517760).

720023040 is an abundant number, since it is smaller than the sum of its proper divisors (2073012480).

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

720023040 is a wasteful number, since it uses less digits than its factorization.

720023040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990 (or 968 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 720023040 is about 26833.2450516146. The cubic root of 720023040 is about 896.2905095396.

Adding to 720023040 its reverse (40320027), we get a palindrome (760343067).

The spelling of 720023040 in words is "seven hundred twenty million, twenty-three thousand, forty".