720031732 has 48 divisors (see below), whose sum is σ = 1494484992. Its totient is φ = 297128160.

The previous prime is 720031703. The next prime is 720031747. The reversal of 720031732 is 237130027.

It is a junction number, because it is equal to n+sod(n) for n = 720031697 and 720031706.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81273 + ... + 89695.

It is an arithmetic number, because the mean of its divisors is an integer number (31135104).

Almost surely, 2^720031732 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720031732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (747242496).

720031732 is an abundant number, since it is smaller than the sum of its proper divisors (774453260).

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

720031732 is a wasteful number, since it uses less digits than its factorization.

720031732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8548 (or 8546 counting only the distinct ones).

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

The square root of 720031732 is about 26833.4070143916. The cubic root of 720031732 is about 896.2941161491.

Adding to 720031732 its reverse (237130027), we get a palindrome (957161759).

The spelling of 720031732 in words is "seven hundred twenty million, thirty-one thousand, seven hundred thirty-two".