720308 has 6 divisors (see below), whose sum is σ = 1260546. Its totient is φ = 360152.

The previous prime is 720301. The next prime is 720311. The reversal of 720308 is 803027.

720308 = T₄₈₇ + T₄₈₈ + ... + T₄₉₂.

It can be written as a sum of positive squares in only one way, i.e., 550564 + 169744 = 742^2 + 412^2 .

It is a super-2 number, since 2×720308² = 1037687229728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 720308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720301) by changing a digit.

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 as a sum of consecutive naturals, namely, 90035 + ... + 90042.

It is an arithmetic number, because the mean of its divisors is an integer number (210091).

2⁷²⁰³⁰⁸ is an apocalyptic number.

It is an amenable number.

720308 is a deficient number, since it is larger than the sum of its proper divisors (540238).

720308 is a wasteful number, since it uses less digits than its factorization.

720308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180081 (or 180079 counting only the distinct ones).

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

The square root of 720308 is about 848.7096087591. The cubic root of 720308 is about 89.6408734116.

The spelling of 720308 in words is "seven hundred twenty thousand, three hundred eight".