406406686 has 12 divisors (see below), whose sum is σ = 709138368. Its totient is φ = 174174252.

The previous prime is 406406669. The next prime is 406406753. The reversal of 406406686 is 686604604.

It is a congruent 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 5 ways as a sum of consecutive naturals, for example, 2073406 + ... + 2073601.

It is an arithmetic number, because the mean of its divisors is an integer number (59094864).

Almost surely, 2^406406686 is an apocalyptic number.

406406686 is a deficient number, since it is larger than the sum of its proper divisors (302731682).

406406686 is a wasteful number, since it uses less digits than its factorization.

406406686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4147023 (or 4147016 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 406406686 is about 20159.5308973200. The cubic root of 406406686 is about 740.7192216137.

The spelling of 406406686 in words is "four hundred six million, four hundred six thousand, six hundred eighty-six".