43081489920 has 480 divisors, whose sum is σ = 161218252800. Its totient is φ = 9785524224.

The previous prime is 43081489877. The next prime is 43081489921. The reversal of 43081489920 is 2998418034.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 43081489920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43081489921) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 89940241 + ... + 89940719.

It is an arithmetic number, because the mean of its divisors is an integer number (335871360).

Almost surely, 2^43081489920 is an apocalyptic number.

43081489920 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 43081489920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80609126400).

43081489920 is an abundant number, since it is smaller than the sum of its proper divisors (118136762880).

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

43081489920 is a wasteful number, since it uses less digits than its factorization.

43081489920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758 (or 735 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The spelling of 43081489920 in words is "forty-three billion, eighty-one million, four hundred eighty-nine thousand, nine hundred twenty".