43126820 has 72 divisors (see below), whose sum is σ = 101352384. Its totient is φ = 15400000.

The previous prime is 43126763. The next prime is 43126843. The reversal of 43126820 is 2862134.

It is a self number, because there is not a number n which added to its sum of digits gives 43126820.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 171695 + ... + 171945.

It is an arithmetic number, because the mean of its divisors is an integer number (1407672).

Almost surely, 2^43126820 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 43126820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50676192).

43126820 is an abundant number, since it is smaller than the sum of its proper divisors (58225564).

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

43126820 is a wasteful number, since it uses less digits than its factorization.

43126820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 43126820 is about 6567.1013392516. The cubic root of 43126820 is about 350.6838873284.

Adding to 43126820 its reverse (2862134), we get a palindrome (45988954).

The spelling of 43126820 in words is "forty-three million, one hundred twenty-six thousand, eight hundred twenty".