720431840 has 24 divisors (see below), whose sum is σ = 1702020600. Its totient is φ = 288172672.

The previous prime is 720431819. The next prime is 720431843. The reversal of 720431840 is 48134027.

720431840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720431843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2251190 + ... + 2251509.

It is an arithmetic number, because the mean of its divisors is an integer number (70917525).

Almost surely, 2^720431840 is an apocalyptic number.

It is an amenable number.

720431840 is an abundant number, since it is smaller than the sum of its proper divisors (981588760).

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

720431840 is a wasteful number, since it uses less digits than its factorization.

720431840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4502714 (or 4502706 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 720431840 is about 26840.8613870718. The cubic root of 720431840 is about 896.4601032974.

Adding to 720431840 its reverse (48134027), we get a palindrome (768565867).

The spelling of 720431840 in words is "seven hundred twenty million, four hundred thirty-one thousand, eight hundred forty".