722820440 has 32 divisors (see below), whose sum is σ = 1645948080. Its totient is φ = 285643392.

The previous prime is 722820391. The next prime is 722820443. The reversal of 722820440 is 44028227.

722820440 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 (722820443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105539 + ... + 112178.

Almost surely, 2^722820440 is an apocalyptic number.

It is an amenable number.

722820440 is an abundant number, since it is smaller than the sum of its proper divisors (923127640).

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

722820440 is a wasteful number, since it uses less digits than its factorization.

722820440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217811 (or 217807 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 722820440 is about 26885.3201580342. The cubic root of 722820440 is about 897.4497516114.

Adding to 722820440 its reverse (44028227), we get a palindrome (766848667).

The spelling of 722820440 in words is "seven hundred twenty-two million, eight hundred twenty thousand, four hundred forty".