686624446 has 16 divisors (see below), whose sum is σ = 1034864640. Its totient is φ = 341674200.

The previous prime is 686624443. The next prime is 686624447. The reversal of 686624446 is 644426686.

It is a junction number, because it is equal to n+sod(n) for n = 686624396 and 686624405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686624443) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 595971 + ... + 597121.

It is an arithmetic number, because the mean of its divisors is an integer number (64679040).

Almost surely, 2^686624446 is an apocalyptic number.

686624446 is a deficient number, since it is larger than the sum of its proper divisors (348240194).

686624446 is a wasteful number, since it uses less digits than its factorization.

686624446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319.

The product of its digits is 1327104, while the sum is 46.

The square root of 686624446 is about 26203.5197254109. The cubic root of 686624446 is about 882.2122567159.

The spelling of 686624446 in words is "six hundred eighty-six million, six hundred twenty-four thousand, four hundred forty-six".