43748878640 has 80 divisors (see below), whose sum is σ = 107315155200. Its totient is φ = 16540505856.

The previous prime is 43748878639. The next prime is 43748878651. The reversal of 43748878640 is 4687884734.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 43748878640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 634499 + ... + 700061.

It is an arithmetic number, because the mean of its divisors is an integer number (1341439440).

Almost surely, 2^43748878640 is an apocalyptic number.

43748878640 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 43748878640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53657577600).

43748878640 is an abundant number, since it is smaller than the sum of its proper divisors (63566276560).

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

43748878640 is a wasteful number, since it uses less digits than its factorization.

43748878640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66034 (or 66028 counting only the distinct ones).

The product of its (nonzero) digits is 28901376, while the sum is 59.

The spelling of 43748878640 in words is "forty-three billion, seven hundred forty-eight million, eight hundred seventy-eight thousand, six hundred forty".