720992 has 12 divisors (see below), whose sum is σ = 1419516. Its totient is φ = 360480.

The previous prime is 720991. The next prime is 720997. The reversal of 720992 is 299027.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11234 + ... + 11297.

It is an arithmetic number, because the mean of its divisors is an integer number (118293).

2⁷²⁰⁹⁹² is an apocalyptic number.

It is an amenable number.

720992 is a deficient number, since it is larger than the sum of its proper divisors (698524).

720992 is a wasteful number, since it uses less digits than its factorization.

720992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22541 (or 22533 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 720992 is about 849.1124778261. The cubic root of 720992 is about 89.6692385738.

The spelling of 720992 in words is "seven hundred twenty thousand, nine hundred ninety-two".