720704 has 14 divisors (see below), whose sum is σ = 1430274. Its totient is φ = 360320.

The previous prime is 720703. The next prime is 720743. The reversal of 720704 is 407027.

It can be written as a sum of positive squares in only one way, i.e., 719104 + 1600 = 848^2 + 40^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5567 + ... + 5694.

2⁷²⁰⁷⁰⁴ is an apocalyptic number.

It is an amenable number.

720704 is a deficient number, since it is larger than the sum of its proper divisors (709570).

720704 is a wasteful number, since it uses less digits than its factorization.

720704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11273 (or 11263 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 720704 is about 848.9428720473. The cubic root of 720704 is about 89.6572975352.

The spelling of 720704 in words is "seven hundred twenty thousand, seven hundred four", and thus it is an iban number.