43640045 has 8 divisors (see below), whose sum is σ = 52476000. Its totient is φ = 34840080.

The previous prime is 43640029. The next prime is 43640053. The reversal of 43640045 is 54004634.

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

It is not a de Polignac number, because 43640045 - 2⁴ = 43640029 is a prime.

It is a super-3 number, since 3×43640045³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43639996 and 43640023.

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, 6251 + ... + 11240.

It is an arithmetic number, because the mean of its divisors is an integer number (6559500).

Almost surely, 2^43640045 is an apocalyptic number.

It is an amenable number.

43640045 is a deficient number, since it is larger than the sum of its proper divisors (8835955).

43640045 is a wasteful number, since it uses less digits than its factorization.

43640045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17995.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 43640045 is about 6606.0612319294. The cubic root of 43640045 is about 352.0694943928.

Adding to 43640045 its reverse (54004634), we get a palindrome (97644679).

The spelling of 43640045 in words is "forty-three million, six hundred forty thousand, forty-five".