73424144440 has 64 divisors (see below), whose sum is σ = 175096546560. Its totient is φ = 27614484480.

The previous prime is 73424144411. The next prime is 73424144447. The reversal of 73424144440 is 4444142437.

It is a super-2 number, since 2×73424144440² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 73424144440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73424144447) 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, 635545 + ... + 742135.

It is an arithmetic number, because the mean of its divisors is an integer number (2735883540).

Almost surely, 2^73424144440 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 73424144440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87548273280).

73424144440 is an abundant number, since it is smaller than the sum of its proper divisors (101672402120).

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

73424144440 is a wasteful number, since it uses less digits than its factorization.

73424144440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107632 (or 107628 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 37.

Adding to 73424144440 its reverse (4444142437), we get a palindrome (77868286877).

The spelling of 73424144440 in words is "seventy-three billion, four hundred twenty-four million, one hundred forty-four thousand, four hundred forty".