720502340 has 12 divisors (see below), whose sum is σ = 1513054956. Its totient is φ = 288200928.

The previous prime is 720502319. The next prime is 720502397. The reversal of 720502340 is 43205027.

It can be written as a sum of positive squares in 2 ways, for example, as 522762496 + 197739844 = 22864^2 + 14062^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 18012539 + ... + 18012578.

It is an arithmetic number, because the mean of its divisors is an integer number (126087913).

Almost surely, 2^720502340 is an apocalyptic number.

It is an amenable number.

720502340 is an abundant number, since it is smaller than the sum of its proper divisors (792552616).

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

720502340 is a wasteful number, since it uses less digits than its factorization.

720502340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36025126 (or 36025124 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 720502340 is about 26842.1746510971. The cubic root of 720502340 is about 896.4893442666.

Adding to 720502340 its reverse (43205027), we get a palindrome (763707367).

The spelling of 720502340 in words is "seven hundred twenty million, five hundred two thousand, three hundred forty".