43120020 has 48 divisors (see below), whose sum is σ = 121504320. Its totient is φ = 11425536.

The previous prime is 43120019. The next prime is 43120027. The reversal of 43120020 is 2002134.

43120020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×43120020² = 3718672249600800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 43119978 and 43120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43120027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7576 + ... + 11984.

It is an arithmetic number, because the mean of its divisors is an integer number (2531340).

Almost surely, 2^43120020 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 43120020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60752160).

43120020 is an abundant number, since it is smaller than the sum of its proper divisors (78384300).

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

43120020 is a wasteful number, since it uses less digits than its factorization.

43120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4584 (or 4582 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 43120020 is about 6566.5835866149. The cubic root of 43120020 is about 350.6654550568.

Adding to 43120020 its reverse (2002134), we get a palindrome (45122154).

The spelling of 43120020 in words is "forty-three million, one hundred twenty thousand, twenty".