724222540 has 24 divisors (see below), whose sum is σ = 1523621232. Its totient is φ = 289164480.

The previous prime is 724222511. The next prime is 724222549. The reversal of 724222540 is 45222427.

It is a junction number, because it is equal to n+sod(n) for n = 724222499 and 724222508.

It is not an unprimeable number, because it can be changed into a prime (724222549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21366 + ... + 43645.

It is an arithmetic number, because the mean of its divisors is an integer number (63484218).

Almost surely, 2^724222540 is an apocalyptic number.

It is an amenable number.

724222540 is an abundant number, since it is smaller than the sum of its proper divisors (799398692).

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

724222540 is a wasteful number, since it uses less digits than its factorization.

724222540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65577 (or 65575 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 28.

The square root of 724222540 is about 26911.3830934049. The cubic root of 724222540 is about 898.0296566116.

Adding to 724222540 its reverse (45222427), we get a palindrome (769444967).

The spelling of 724222540 in words is "seven hundred twenty-four million, two hundred twenty-two thousand, five hundred forty".