686434 has 8 divisors (see below), whose sum is σ = 1176768. Its totient is φ = 294180.

The previous prime is 686423. The next prime is 686437. The reversal of 686434 is 434686.

686434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 686396 and 686405.

It is not an unprimeable number, because it can be changed into a prime (686437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24502 + ... + 24529.

It is an arithmetic number, because the mean of its divisors is an integer number (147096).

2⁶⁸⁶⁴³⁴ is an apocalyptic number.

686434 is a deficient number, since it is larger than the sum of its proper divisors (490334).

686434 is a wasteful number, since it uses less digits than its factorization.

686434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49040.

The product of its digits is 13824, while the sum is 31.

The square root of 686434 is about 828.5131260276. The cubic root of 686434 is about 88.2130684064.

The spelling of 686434 in words is "six hundred eighty-six thousand, four hundred thirty-four".