43673728 has 64 divisors (see below), whose sum is σ = 100857600. Its totient is φ = 18450432.

The previous prime is 43673719. The next prime is 43673737. The reversal of 43673728 is 82737634.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (43673719) and next prime (43673737).

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70476 + ... + 71092.

It is an arithmetic number, because the mean of its divisors is an integer number (1575900).

Almost surely, 2^43673728 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 43673728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50428800).

43673728 is an abundant number, since it is smaller than the sum of its proper divisors (57183872).

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

43673728 is an equidigital number, since it uses as much as digits as its factorization.

43673728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717 (or 705 counting only the distinct ones).

The product of its digits is 169344, while the sum is 40.

The square root of 43673728 is about 6608.6101413232. The cubic root of 43673728 is about 352.1600511821.

The spelling of 43673728 in words is "forty-three million, six hundred seventy-three thousand, seven hundred twenty-eight".