686064246 has 32 divisors (see below), whose sum is σ = 1579441920. Its totient is φ = 194606496.

The previous prime is 686064233. The next prime is 686064271. The reversal of 686064246 is 642460686.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 686064198 and 686064207.

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 15 ways as a sum of consecutive naturals, for example, 52921 + ... + 64596.

It is an arithmetic number, because the mean of its divisors is an integer number (49357560).

Almost surely, 2^686064246 is an apocalyptic number.

686064246 is an abundant number, since it is smaller than the sum of its proper divisors (893377674).

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

686064246 is a wasteful number, since it uses less digits than its factorization.

686064246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117668.

The product of its (nonzero) digits is 331776, while the sum is 42.

The square root of 686064246 is about 26192.8281405426. The cubic root of 686064246 is about 881.9722663417.

The spelling of 686064246 in words is "six hundred eighty-six million, sixty-four thousand, two hundred forty-six".