43668645 has 8 divisors (see below), whose sum is σ = 69869856. Its totient is φ = 23289936.

The previous prime is 43668617. The next prime is 43668659. The reversal of 43668645 is 54686634.

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

It is not a de Polignac number, because 43668645 - 2¹⁰ = 43667621 is a prime.

It is a super-2 number, since 2×43668645² = 3813901112272050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43668597 and 43668606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1455607 + ... + 1455636.

It is an arithmetic number, because the mean of its divisors is an integer number (8733732).

Almost surely, 2^43668645 is an apocalyptic number.

It is an amenable number.

43668645 is a deficient number, since it is larger than the sum of its proper divisors (26201211).

43668645 is a wasteful number, since it uses less digits than its factorization.

43668645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911251.

The product of its digits is 414720, while the sum is 42.

The square root of 43668645 is about 6608.2255560778. The cubic root of 43668645 is about 352.1463885137.

The spelling of 43668645 in words is "forty-three million, six hundred sixty-eight thousand, six hundred forty-five".