43103720 has 64 divisors (see below), whose sum is σ = 106626240. Its totient is φ = 15552000.

The previous prime is 43103717. The next prime is 43103729. The reversal of 43103720 is 2730134.

43103720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 43103692 and 43103701.

It is not an unprimeable number, because it can be changed into a prime (43103729) 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, 71420 + ... + 72020.

It is an arithmetic number, because the mean of its divisors is an integer number (1666035).

Almost surely, 2^43103720 is an apocalyptic number.

43103720 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 43103720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53313120).

43103720 is an abundant number, since it is smaller than the sum of its proper divisors (63522520).

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

43103720 is a wasteful number, since it uses less digits than its factorization.

43103720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786 (or 782 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 43103720 is about 6565.3423368473. The cubic root of 43103720 is about 350.6212639263.

Adding to 43103720 its reverse (2730134), we get a palindrome (45833854).

The spelling of 43103720 in words is "forty-three million, one hundred three thousand, seven hundred twenty".