720563684 has 48 divisors (see below), whose sum is σ = 1316755440. Its totient is φ = 344770560.

The previous prime is 720563651. The next prime is 720563687. The reversal of 720563684 is 486365027.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 7139584 + 713424100 = 2672^2 + 26710^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (720563687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3092432 + ... + 3092664.

It is an arithmetic number, because the mean of its divisors is an integer number (27432405).

Almost surely, 2^720563684 is an apocalyptic number.

It is an amenable number.

720563684 is a deficient number, since it is larger than the sum of its proper divisors (596191756).

720563684 is a wasteful number, since it uses less digits than its factorization.

720563684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560 (or 558 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 720563684 is about 26843.3173061751. The cubic root of 720563684 is about 896.5147860908.

The spelling of 720563684 in words is "seven hundred twenty million, five hundred sixty-three thousand, six hundred eighty-four".