43820043 has 4 divisors (see below), whose sum is σ = 58426728. Its totient is φ = 29213360.

The previous prime is 43820017. The next prime is 43820047. The reversal of 43820043 is 34002834.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43820043 - 2¹⁰ = 43819019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43819995 and 43820022.

It is not an unprimeable number, because it can be changed into a prime (43820047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7303338 + ... + 7303343.

It is an arithmetic number, because the mean of its divisors is an integer number (14606682).

Almost surely, 2^43820043 is an apocalyptic number.

43820043 is a deficient number, since it is larger than the sum of its proper divisors (14606685).

43820043 is a wasteful number, since it uses less digits than its factorization.

43820043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14606684.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 43820043 is about 6619.6709132705. The cubic root of 43820043 is about 352.5528797486.

Adding to 43820043 its reverse (34002834), we get a palindrome (77822877).

The spelling of 43820043 in words is "forty-three million, eight hundred twenty thousand, forty-three".