720318 has 16 divisors (see below), whose sum is σ = 1449216. Its totient is φ = 238680.

The previous prime is 720311. The next prime is 720319. The reversal of 720318 is 813027.

It is a super-2 number, since 2×720318² = 1037716042248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 720294 and 720303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720311) by changing a digit.

720318 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1405 + ... + 1847.

It is an arithmetic number, because the mean of its divisors is an integer number (90576).

2⁷²⁰³¹⁸ is an apocalyptic number.

720318 is an abundant number, since it is smaller than the sum of its proper divisors (728898).

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

720318 is a wasteful number, since it uses less digits than its factorization.

720318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 720318 is about 848.7155000352. The cubic root of 720318 is about 89.6412882363.

The spelling of 720318 in words is "seven hundred twenty thousand, three hundred eighteen".