43973449728 has 192 divisors, whose sum is σ = 126599316480. Its totient is φ = 13493108736.

The previous prime is 43973449693. The next prime is 43973449739. The reversal of 43973449728 is 82794437934.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48481851 + ... + 48482757.

It is an arithmetic number, because the mean of its divisors is an integer number (659371440).

Almost surely, 2^43973449728 is an apocalyptic number.

43973449728 is a gapful number since it is divisible by the number (48) 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 43973449728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63299658240).

43973449728 is an abundant number, since it is smaller than the sum of its proper divisors (82625866752).

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

43973449728 is a wasteful number, since it uses less digits than its factorization.

43973449728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552 (or 1532 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 60.

The spelling of 43973449728 in words is "forty-three billion, nine hundred seventy-three million, four hundred forty-nine thousand, seven hundred twenty-eight".