723305320420 has 12 divisors (see below), whose sum is σ = 1518941172924. Its totient is φ = 289322128160.

The previous prime is 723305320363. The next prime is 723305320427. The reversal of 723305320420 is 24023503327.

It is a happy number.

723305320420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 320935846144 + 402369474276 = 566512^2 + 634326^2 .

It is not an unprimeable number, because it can be changed into a prime (723305320427) 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, 18082632991 + ... + 18082633030.

It is an arithmetic number, because the mean of its divisors is an integer number (126578431077).

Almost surely, 2^723305320420 is an apocalyptic number.

It is an amenable number.

723305320420 is an abundant number, since it is smaller than the sum of its proper divisors (795635852504).

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

723305320420 is a wasteful number, since it uses less digits than its factorization.

723305320420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36165266030 (or 36165266028 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 31.

Adding to 723305320420 its reverse (24023503327), we get a palindrome (747328823747).

The spelling of 723305320420 in words is "seven hundred twenty-three billion, three hundred five million, three hundred twenty thousand, four hundred twenty".