722329021440 has 440 divisors, whose sum is σ = 2787548757840. Its totient is φ = 177802739712.

The previous prime is 722329021409. The next prime is 722329021507. The reversal of 722329021440 is 44120923227.

It is a happy number.

722329021440 is a `hidden beast` number, since 7 + 223 + 290 + 2 + 144 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 722329021395 and 722329021404.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 5324371 + ... + 5458349.

It is an arithmetic number, because the mean of its divisors is an integer number (6335338086).

Almost surely, 2^722329021440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722329021440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1393774378920).

722329021440 is an abundant number, since it is smaller than the sum of its proper divisors (2065219736400).

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

722329021440 is a wasteful number, since it uses less digits than its factorization.

722329021440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134029 (or 134002 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

Adding to 722329021440 its reverse (44120923227), we get a palindrome (766449944667).

The spelling of 722329021440 in words is "seven hundred twenty-two billion, three hundred twenty-nine million, twenty-one thousand, four hundred forty".