408643045 has 4 divisors (see below), whose sum is σ = 490371660. Its totient is φ = 326914432.

The previous prime is 408643033. The next prime is 408643049. The reversal of 408643045 is 540346804.

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

It can be written as a sum of positive squares in 2 ways, for example, as 143376676 + 265266369 = 11974^2 + 16287^2 .

It is a cyclic number.

It is not a de Polignac number, because 408643045 - 2²⁷ = 274425317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 408643045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408643049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40864300 + ... + 40864309.

It is an arithmetic number, because the mean of its divisors is an integer number (122592915).

Almost surely, 2^408643045 is an apocalyptic number.

It is an amenable number.

408643045 is a deficient number, since it is larger than the sum of its proper divisors (81728615).

408643045 is an equidigital number, since it uses as much as digits as its factorization.

408643045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81728614.

The product of its (nonzero) digits is 46080, while the sum is 34.

The square root of 408643045 is about 20214.9213453825. The cubic root of 408643045 is about 742.0754040965.

Adding to 408643045 its reverse (540346804), we get a palindrome (948989849).

The spelling of 408643045 in words is "four hundred eight million, six hundred forty-three thousand, forty-five".