720884 has 6 divisors (see below), whose sum is σ = 1261554. Its totient is φ = 360440.

The previous prime is 720877. The next prime is 720887. The reversal of 720884 is 488027.

It can be written as a sum of positive squares in only one way, i.e., 605284 + 115600 = 778^2 + 340^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720887) by changing a digit.

720884 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 as a sum of consecutive naturals, namely, 90107 + ... + 90114.

It is an arithmetic number, because the mean of its divisors is an integer number (210259).

2⁷²⁰⁸⁸⁴ is an apocalyptic number.

It is an amenable number.

720884 is a deficient number, since it is larger than the sum of its proper divisors (540670).

720884 is a wasteful number, since it uses less digits than its factorization.

720884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180225 (or 180223 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 720884 is about 849.0488796294. The cubic root of 720884 is about 89.6647610570.

The spelling of 720884 in words is "seven hundred twenty thousand, eight hundred eighty-four".