42723384440 has 128 divisors (see below), whose sum is σ = 109126828800. Its totient is φ = 14916894720.

The previous prime is 42723384433. The next prime is 42723384449. The reversal of 42723384440 is 4448332724.

It is a happy number.

It is a super-2 number, since 2×42723384440² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42723384449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1097144 + ... + 1135416.

It is an arithmetic number, because the mean of its divisors is an integer number (852553350).

Almost surely, 2^42723384440 is an apocalyptic number.

42723384440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42723384440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54563414400).

42723384440 is an abundant number, since it is smaller than the sum of its proper divisors (66403444360).

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

42723384440 is a wasteful number, since it uses less digits than its factorization.

42723384440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38397 (or 38393 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 41.

The spelling of 42723384440 in words is "forty-two billion, seven hundred twenty-three million, three hundred eighty-four thousand, four hundred forty".