43881656220 has 144 divisors (see below), whose sum is σ = 136935646848. Its totient is φ = 11368903680.

The previous prime is 43881656209. The next prime is 43881656227. The reversal of 43881656220 is 2265618834.

43881656220 is a `hidden beast` number, since 4 + 3 + 8 + 8 + 16 + 5 + 622 + 0 = 666.

It is a super-2 number, since 2×43881656220² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43881656227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1140090 + ... + 1177950.

It is an arithmetic number, because the mean of its divisors is an integer number (950941992).

Almost surely, 2^43881656220 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 43881656220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68467823424).

43881656220 is an abundant number, since it is smaller than the sum of its proper divisors (93053990628).

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

43881656220 is a wasteful number, since it uses less digits than its factorization.

43881656220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38060 (or 38055 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 43881656220 in words is "forty-three billion, eight hundred eighty-one million, six hundred fifty-six thousand, two hundred twenty".