720623520 has 192 divisors, whose sum is σ = 2604026880. Its totient is φ = 185932800.

The previous prime is 720623509. The next prime is 720623521. The reversal of 720623520 is 25326027.

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 (720623521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131230 + ... + 136610.

It is an arithmetic number, because the mean of its divisors is an integer number (13562640).

Almost surely, 2^720623520 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 720623520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1302013440).

720623520 is an abundant number, since it is smaller than the sum of its proper divisors (1883403360).

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

720623520 is a wasteful number, since it uses less digits than its factorization.

720623520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5436 (or 5422 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 720623520 is about 26844.4318248683. The cubic root of 720623520 is about 896.5396010957.

Adding to 720623520 its reverse (25326027), we get a palindrome (745949547).

The spelling of 720623520 in words is "seven hundred twenty million, six hundred twenty-three thousand, five hundred twenty".