720402322 has 4 divisors (see below), whose sum is σ = 1080603486. Its totient is φ = 360201160.

The previous prime is 720402259. The next prime is 720402329. The reversal of 720402322 is 223204027.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 708145321 + 12257001 = 26611^2 + 3501^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 720402293 and 720402302.

It is not an unprimeable number, because it can be changed into a prime (720402329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180100579 + ... + 180100582.

Almost surely, 2^720402322 is an apocalyptic number.

720402322 is a deficient number, since it is larger than the sum of its proper divisors (360201164).

720402322 is a wasteful number, since it uses less digits than its factorization.

720402322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360201163.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 720402322 is about 26840.3115108599. The cubic root of 720402322 is about 896.4478596821.

Adding to 720402322 its reverse (223204027), we get a palindrome (943606349).

The spelling of 720402322 in words is "seven hundred twenty million, four hundred two thousand, three hundred twenty-two".