406857428686 has 16 divisors (see below), whose sum is σ = 618040843200. Its totient is φ = 200844060768.

The previous prime is 406857428651. The next prime is 406857428699. The reversal of 406857428686 is 686824758604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4169260 + ... + 4265728.

It is an arithmetic number, because the mean of its divisors is an integer number (38627552700).

Almost surely, 2^406857428686 is an apocalyptic number.

406857428686 is a deficient number, since it is larger than the sum of its proper divisors (211183414514).

406857428686 is a wasteful number, since it uses less digits than its factorization.

406857428686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123243.

The product of its (nonzero) digits is 123863040, while the sum is 64.

The spelling of 406857428686 in words is "four hundred six billion, eight hundred fifty-seven million, four hundred twenty-eight thousand, six hundred eighty-six".