43436113920 has 384 divisors, whose sum is σ = 156296256480. Its totient is φ = 11572346880.

The previous prime is 43436113909. The next prime is 43436113927. The reversal of 43436113920 is 2931163434.

43436113920 is a `hidden beast` number, since 4 + 3 + 4 + 3 + 611 + 39 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (43436113927) 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 23 ways as a sum of consecutive naturals, for example, 39812575 + ... + 39813665.

Almost surely, 2^43436113920 is an apocalyptic number.

43436113920 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 43436113920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78148128240).

43436113920 is an abundant number, since it is smaller than the sum of its proper divisors (112860142560).

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

43436113920 is an frugal number, since it uses more digits than its factorization.

43436113920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141 (or 1101 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The spelling of 43436113920 in words is "forty-three billion, four hundred thirty-six million, one hundred thirteen thousand, nine hundred twenty".