686423284 has 6 divisors (see below), whose sum is σ = 1201240754. Its totient is φ = 343211640.

The previous prime is 686423281. The next prime is 686423291. The reversal of 686423284 is 482324686.

It can be written as a sum of positive squares in only one way, i.e., 500864400 + 185558884 = 22380^2 + 13622^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 686423284.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686423281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85802907 + ... + 85802914.

Almost surely, 2^686423284 is an apocalyptic number.

It is an amenable number.

686423284 is a deficient number, since it is larger than the sum of its proper divisors (514817470).

686423284 is a wasteful number, since it uses less digits than its factorization.

686423284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171605825 (or 171605823 counting only the distinct ones).

The product of its digits is 442368, while the sum is 43.

The square root of 686423284 is about 26199.6809904243. The cubic root of 686423284 is about 882.1260936919.

The spelling of 686423284 in words is "six hundred eighty-six million, four hundred twenty-three thousand, two hundred eighty-four".