43621878720 has 448 divisors, whose sum is σ = 161800519680. Its totient is φ = 9751891968.

The previous prime is 43621878673. The next prime is 43621878767. The reversal of 43621878720 is 2787812634.

It is an interprime number because it is at equal distance from previous prime (43621878673) and next prime (43621878767).

It is a tau number, because it is divible by the number of its divisors (448).

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 43621878720.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 67421437 + ... + 67422083.

Almost surely, 2^43621878720 is an apocalyptic number.

43621878720 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 43621878720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80900259840).

43621878720 is an abundant number, since it is smaller than the sum of its proper divisors (118178640960).

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

43621878720 is a wasteful number, since it uses less digits than its factorization.

43621878720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880 (or 870 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 48.

The spelling of 43621878720 in words is "forty-three billion, six hundred twenty-one million, eight hundred seventy-eight thousand, seven hundred twenty".