43620431 has 8 divisors (see below), whose sum is σ = 44622144. Its totient is φ = 42625440.

The previous prime is 43620349. The next prime is 43620439. The reversal of 43620431 is 13402634.

It is a happy number.

43620431 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43620431 is a prime.

It is a super-2 number, since 2×43620431² = 3805484001251522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43620397 and 43620406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43620439) 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, 12845 + ... + 15881.

It is an arithmetic number, because the mean of its divisors is an integer number (5577768).

Almost surely, 2^43620431 is an apocalyptic number.

43620431 is a deficient number, since it is larger than the sum of its proper divisors (1001713).

43620431 is a wasteful number, since it uses less digits than its factorization.

43620431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 43620431 is about 6604.5765193538. The cubic root of 43620431 is about 352.0167406596.

The spelling of 43620431 in words is "forty-three million, six hundred twenty thousand, four hundred thirty-one".