409238668 has 12 divisors (see below), whose sum is σ = 723259152. Its totient is φ = 202593200.

The previous prime is 409238623. The next prime is 409238717. The reversal of 409238668 is 866832904.

It is a happy number.

It is an unprimeable number.

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, 506080 + ... + 506887.

It is an arithmetic number, because the mean of its divisors is an integer number (60271596).

Almost surely, 2^409238668 is an apocalyptic number.

It is an amenable number.

409238668 is a deficient number, since it is larger than the sum of its proper divisors (314020484).

409238668 is a wasteful number, since it uses less digits than its factorization.

409238668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013072 (or 1013070 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 409238668 is about 20229.6482421223. The cubic root of 409238668 is about 742.4357696293.

The spelling of 409238668 in words is "four hundred nine million, two hundred thirty-eight thousand, six hundred sixty-eight".