686456406 has 24 divisors (see below), whose sum is σ = 1509523704. Its totient is φ = 225403200.

The previous prime is 686456369. The next prime is 686456423. The reversal of 686456406 is 604654686.

686456406 is a `hidden beast` number, since 6 + 86 + 4 + 564 + 0 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

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, 283395 + ... + 285806.

It is an arithmetic number, because the mean of its divisors is an integer number (62896821).

Almost surely, 2^686456406 is an apocalyptic number.

686456406 is an abundant number, since it is smaller than the sum of its proper divisors (823067298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

686456406 is a wasteful number, since it uses less digits than its factorization.

686456406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569276 (or 569273 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The square root of 686456406 is about 26200.3130897323. The cubic root of 686456406 is about 882.1402818813.

The spelling of 686456406 in words is "six hundred eighty-six million, four hundred fifty-six thousand, four hundred six".