43920321 has 8 divisors (see below), whose sum is σ = 58592064. Its totient is φ = 29264400.

The previous prime is 43920281. The next prime is 43920323. The reversal of 43920321 is 12302934.

43920321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43920321 - 2⁶ = 43920257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43920291 and 43920300.

It is not an unprimeable number, because it can be changed into a prime (43920323) 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 7 ways as a sum of consecutive naturals, for example, 6396 + ... + 11346.

It is an arithmetic number, because the mean of its divisors is an integer number (7324008).

Almost surely, 2^43920321 is an apocalyptic number.

It is an amenable number.

43920321 is a deficient number, since it is larger than the sum of its proper divisors (14671743).

43920321 is a wasteful number, since it uses less digits than its factorization.

43920321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7911.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 43920321 is about 6627.2408285802. The cubic root of 43920321 is about 352.8216027799.

The spelling of 43920321 in words is "forty-three million, nine hundred twenty thousand, three hundred twenty-one".