43821408 has 48 divisors (see below), whose sum is σ = 115831296. Its totient is φ = 14505600.

The previous prime is 43821403. The next prime is 43821433. The reversal of 43821408 is 80412834.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43821403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12985 + ... + 16007.

It is an arithmetic number, because the mean of its divisors is an integer number (2413152).

Almost surely, 2^43821408 is an apocalyptic number.

43821408 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 43821408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57915648).

43821408 is an abundant number, since it is smaller than the sum of its proper divisors (72009888).

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

43821408 is a wasteful number, since it uses less digits than its factorization.

43821408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3187 (or 3179 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 43821408 is about 6619.7740142697. The cubic root of 43821408 is about 352.5565403999.

The spelling of 43821408 in words is "forty-three million, eight hundred twenty-one thousand, four hundred eight".