720689712 has 40 divisors (see below), whose sum is σ = 1866819504. Its totient is φ = 239579904.

The previous prime is 720689657. The next prime is 720689713. The reversal of 720689712 is 217986027.

720689712 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (720689713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2223 + ... + 38030.

Almost surely, 2^720689712 is an apocalyptic number.

It is an amenable number.

720689712 is an abundant number, since it is smaller than the sum of its proper divisors (1146129792).

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

720689712 is a wasteful number, since it uses less digits than its factorization.

720689712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40637 (or 40631 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 720689712 is about 26845.6646779326. The cubic root of 720689712 is about 896.5670504414.

The spelling of 720689712 in words is "seven hundred twenty million, six hundred eighty-nine thousand, seven hundred twelve".