720680444 has 12 divisors (see below), whose sum is σ = 1375844568. Its totient is φ = 327582000.

The previous prime is 720680407. The next prime is 720680447. The reversal of 720680444 is 444086027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720680447) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8189507 + ... + 8189594.

It is an arithmetic number, because the mean of its divisors is an integer number (114653714).

Almost surely, 2^720680444 is an apocalyptic number.

It is an amenable number.

720680444 is a deficient number, since it is larger than the sum of its proper divisors (655164124).

720680444 is a wasteful number, since it uses less digits than its factorization.

720680444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16379116 (or 16379114 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 720680444 is about 26845.4920610519. The cubic root of 720680444 is about 896.5632071697.

The spelling of 720680444 in words is "seven hundred twenty million, six hundred eighty thousand, four hundred forty-four".