720560 has 20 divisors (see below), whose sum is σ = 1675488. Its totient is φ = 288192.

The previous prime is 720547. The next prime is 720569. The reversal of 720560 is 65027.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (720569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4424 + ... + 4583.

2⁷²⁰⁵⁶⁰ is an apocalyptic number.

It is an amenable number.

720560 is an abundant number, since it is smaller than the sum of its proper divisors (954928).

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

720560 is a wasteful number, since it uses less digits than its factorization.

720560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9020 (or 9014 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 720560 is about 848.8580564500. The cubic root of 720560 is about 89.6513258229.

Adding to 720560 its reverse (65027), we get a palindrome (785587).

The spelling of 720560 in words is "seven hundred twenty thousand, five hundred sixty".