720732 has 24 divisors (see below), whose sum is σ = 1781136. Its totient is φ = 226048.

The previous prime is 720703. The next prime is 720743. The reversal of 720732 is 237027.

It is a junction number, because it is equal to n+sod(n) for n = 720699 and 720708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1563 + ... + 1970.

It is an arithmetic number, because the mean of its divisors is an integer number (74214).

2⁷²⁰⁷³² is an apocalyptic number.

It is an amenable number.

720732 is an abundant number, since it is smaller than the sum of its proper divisors (1060404).

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

720732 is a wasteful number, since it uses less digits than its factorization.

720732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3557 (or 3555 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 21.

The square root of 720732 is about 848.9593629851. The cubic root of 720732 is about 89.6584586091.

Adding to 720732 its reverse (237027), we get a palindrome (957759).

The spelling of 720732 in words is "seven hundred twenty thousand, seven hundred thirty-two".