720753730 has 16 divisors (see below), whose sum is σ = 1299945024. Its totient is φ = 287726320.

The previous prime is 720753721. The next prime is 720753749. The reversal of 720753730 is 37357027.

720753730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 66616 + ... + 76675.

It is an arithmetic number, because the mean of its divisors is an integer number (81246564).

Almost surely, 2^720753730 is an apocalyptic number.

720753730 is a deficient number, since it is larger than the sum of its proper divisors (579191294).

720753730 is a wasteful number, since it uses less digits than its factorization.

720753730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143801.

The product of its (nonzero) digits is 30870, while the sum is 34.

The square root of 720753730 is about 26846.8569855020. The cubic root of 720753730 is about 896.5935966462.

The spelling of 720753730 in words is "seven hundred twenty million, seven hundred fifty-three thousand, seven hundred thirty".