408742409 has 8 divisors (see below), whose sum is σ = 430906368. Its totient is φ = 387139680.

The previous prime is 408742387. The next prime is 408742469. The reversal of 408742409 is 904247804.

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-408742409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (408742469) 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, 138812 + ... + 141725.

It is an arithmetic number, because the mean of its divisors is an integer number (53863296).

Almost surely, 2^408742409 is an apocalyptic number.

It is an amenable number.

408742409 is a deficient number, since it is larger than the sum of its proper divisors (22163959).

408742409 is a wasteful number, since it uses less digits than its factorization.

408742409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280615.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 408742409 is about 20217.3788855034. The cubic root of 408742409 is about 742.1355459129.

The spelling of 408742409 in words is "four hundred eight million, seven hundred forty-two thousand, four hundred nine".