722500440 has 64 divisors (see below), whose sum is σ = 2169992160. Its totient is φ = 192445440.

The previous prime is 722500423. The next prime is 722500447. The reversal of 722500440 is 44005227.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 722500440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722500447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119572 + ... + 125468.

Almost surely, 2^722500440 is an apocalyptic number.

It is an amenable number.

722500440 is an abundant number, since it is smaller than the sum of its proper divisors (1447491720).

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

722500440 is a wasteful number, since it uses less digits than its factorization.

722500440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6932 (or 6928 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 722500440 is about 26879.3682961486. The cubic root of 722500440 is about 897.3172953356.

Adding to 722500440 its reverse (44005227), we get a palindrome (766505667).

The spelling of 722500440 in words is "seven hundred twenty-two million, five hundred thousand, four hundred forty".