409660394 has 24 divisors (see below), whose sum is σ = 725892192. Its totient is φ = 171883920.

The previous prime is 409660393. The next prime is 409660403. The reversal of 409660394 is 493066904.

It is a super-4 number, since 4×409660394⁴ (a number of 36 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (409660393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51374 + ... + 58809.

It is an arithmetic number, because the mean of its divisors is an integer number (30245508).

Almost surely, 2^409660394 is an apocalyptic number.

409660394 is a deficient number, since it is larger than the sum of its proper divisors (316231798).

409660394 is a wasteful number, since it uses less digits than its factorization.

409660394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110222 (or 110209 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 409660394 is about 20240.0690216214. The cubic root of 409660394 is about 742.6907121202.

The spelling of 409660394 in words is "four hundred nine million, six hundred sixty thousand, three hundred ninety-four".