720860 has 48 divisors (see below), whose sum is σ = 1827840. Its totient is φ = 233280.

The previous prime is 720857. The next prime is 720869. The reversal of 720860 is 68027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2525 + ... + 2795.

It is an arithmetic number, because the mean of its divisors is an integer number (38080).

2⁷²⁰⁸⁶⁰ is an apocalyptic number.

720860 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (913920).

720860 is an abundant number, since it is smaller than the sum of its proper divisors (1106980).

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

720860 is a wasteful number, since it uses less digits than its factorization.

720860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 720860 is about 849.0347460499. The cubic root of 720860 is about 89.6637659926.

Adding to 720860 its reverse (68027), we get a palindrome (788887).

The spelling of 720860 in words is "seven hundred twenty thousand, eight hundred sixty".