720830 has 16 divisors (see below), whose sum is σ = 1415664. Its totient is φ = 262080.

The previous prime is 720829. The next prime is 720847. The reversal of 720830 is 38027.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3167 + ... + 3386.

It is an arithmetic number, because the mean of its divisors is an integer number (88479).

2⁷²⁰⁸³⁰ is an apocalyptic number.

720830 is a deficient number, since it is larger than the sum of its proper divisors (694834).

720830 is a wasteful number, since it uses less digits than its factorization.

720830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6571.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 720830 is about 849.0170787446. The cubic root of 720830 is about 89.6625221309.

Adding to 720830 its reverse (38027), we get a palindrome (758857).

The spelling of 720830 in words is "seven hundred twenty thousand, eight hundred thirty".