720344736 has 36 divisors (see below), whose sum is σ = 2048481162. Its totient is φ = 240114816.

The previous prime is 720344719. The next prime is 720344743. The reversal of 720344736 is 637443027.

It is a happy number.

720344736 is a `hidden beast` number, since 7 + 203 + 447 + 3 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 459845136 + 260499600 = 21444^2 + 16140^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 720344736.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1250311 + ... + 1250886.

Almost surely, 2^720344736 is an apocalyptic number.

It is an amenable number.

720344736 is an abundant number, since it is smaller than the sum of its proper divisors (1328136426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

720344736 is a wasteful number, since it uses less digits than its factorization.

720344736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501213 (or 2501202 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 36.

The square root of 720344736 is about 26839.2387373413. The cubic root of 720344736 is about 896.4239729268.

The spelling of 720344736 in words is "seven hundred twenty million, three hundred forty-four thousand, seven hundred thirty-six".