720528747 has 8 divisors (see below), whose sum is σ = 961015440. Its totient is φ = 480197280.

The previous prime is 720528733. The next prime is 720528791. The reversal of 720528747 is 747825027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 720528747 - 2¹⁰ = 720527723 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 720528699 and 720528708.

It is not an unprimeable number, because it can be changed into a prime (720528947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27504 + ... + 46877.

It is an arithmetic number, because the mean of its divisors is an integer number (120126930).

Almost surely, 2^720528747 is an apocalyptic number.

720528747 is a deficient number, since it is larger than the sum of its proper divisors (240486693).

720528747 is a wasteful number, since it uses less digits than its factorization.

720528747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77613.

The product of its (nonzero) digits is 219520, while the sum is 42.

The square root of 720528747 is about 26842.6665404166. Note that the first 3 decimals coincide. The cubic root of 720528747 is about 896.5002964887.

The spelling of 720528747 in words is "seven hundred twenty million, five hundred twenty-eight thousand, seven hundred forty-seven".