720752 has 20 divisors (see below), whose sum is σ = 1412856. Its totient is φ = 356160.

The previous prime is 720743. The next prime is 720763. The reversal of 720752 is 257027.

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

720752 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 in 3 ways as a sum of consecutive naturals, for example, 1502 + ... + 1922.

2⁷²⁰⁷⁵² is an apocalyptic number.

It is an amenable number.

720752 is a deficient number, since it is larger than the sum of its proper divisors (692104).

720752 is a wasteful number, since it uses less digits than its factorization.

720752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536 (or 530 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 23.

The square root of 720752 is about 848.9711420302. The cubic root of 720752 is about 89.6592879292.

Adding to 720752 its reverse (257027), we get a palindrome (977779).

The spelling of 720752 in words is "seven hundred twenty thousand, seven hundred fifty-two".