408499505 has 4 divisors (see below), whose sum is σ = 490199412. Its totient is φ = 326799600.

The previous prime is 408499501. The next prime is 408499519. The reversal of 408499505 is 505994804.

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 59706529 + 348792976 = 7727^2 + 18676^2 .

It is not a de Polignac number, because 408499505 - 2² = 408499501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (408499501) 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 3 ways as a sum of consecutive naturals, for example, 40849946 + ... + 40849955.

It is an arithmetic number, because the mean of its divisors is an integer number (122549853).

Almost surely, 2^408499505 is an apocalyptic number.

It is an amenable number.

408499505 is a deficient number, since it is larger than the sum of its proper divisors (81699907).

408499505 is an equidigital number, since it uses as much as digits as its factorization.

408499505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81699906.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 408499505 is about 20211.3706858293. The cubic root of 408499505 is about 741.9885067591.

The spelling of 408499505 in words is "four hundred eight million, four hundred ninety-nine thousand, five hundred five".