720506560 has 56 divisors (see below), whose sum is σ = 1729313280. Its totient is φ = 285917184.

The previous prime is 720506503. The next prime is 720506573. The reversal of 720506560 is 65605027.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 31776 + ... + 49504.

Almost surely, 2^720506560 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 720506560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (864656640).

720506560 is an abundant number, since it is smaller than the sum of its proper divisors (1008806720).

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

720506560 is a wasteful number, since it uses less digits than its factorization.

720506560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17873 (or 17863 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 720506560 is about 26842.2532586219. The cubic root of 720506560 is about 896.4910945166.

The spelling of 720506560 in words is "seven hundred twenty million, five hundred six thousand, five hundred sixty".