720584745 has 16 divisors (see below), whose sum is σ = 1158976512. Its totient is φ = 382298240.

The previous prime is 720584743. The next prime is 720584749. The reversal of 720584745 is 547485027.

It is not a de Polignac number, because 720584745 - 2¹ = 720584743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 720584697 and 720584706.

It is not an unprimeable number, because it can be changed into a prime (720584743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122892 + ... + 128621.

It is an arithmetic number, because the mean of its divisors is an integer number (72436032).

Almost surely, 2^720584745 is an apocalyptic number.

It is an amenable number.

720584745 is a deficient number, since it is larger than the sum of its proper divisors (438391767).

720584745 is a wasteful number, since it uses less digits than its factorization.

720584745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251712.

The product of its (nonzero) digits is 313600, while the sum is 42.

The square root of 720584745 is about 26843.7095983398. The cubic root of 720584745 is about 896.5235206017.

The spelling of 720584745 in words is "seven hundred twenty million, five hundred eighty-four thousand, seven hundred forty-five".