736720 has 20 divisors (see below), whose sum is σ = 1713060. Its totient is φ = 294656.

The previous prime is 736717. The next prime is 736721. The reversal of 736720 is 27637.

It can be written as a sum of positive squares in 2 ways, for example, as 183184 + 553536 = 428^2 + 744^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (736721) 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 in 3 ways as a sum of consecutive naturals, for example, 4525 + ... + 4684.

It is an arithmetic number, because the mean of its divisors is an integer number (85653).

2⁷³⁶⁷²⁰ is an apocalyptic number.

It is an amenable number.

736720 is an abundant number, since it is smaller than the sum of its proper divisors (976340).

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

736720 is a wasteful number, since it uses less digits than its factorization.

736720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9222 (or 9216 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 736720 is about 858.3239481688. The cubic root of 736720 is about 90.3165805758.

The spelling of 736720 in words is "seven hundred thirty-six thousand, seven hundred twenty".