684646422 has 8 divisors (see below), whose sum is σ = 1369292856. Its totient is φ = 228215472.

The previous prime is 684646381. The next prime is 684646427. The reversal of 684646422 is 224646486.

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

684646422 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684646427) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 57053863 + ... + 57053874.

It is an arithmetic number, because the mean of its divisors is an integer number (171161607).

Almost surely, 2^684646422 is an apocalyptic number.

684646422 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

684646422 is a wasteful number, since it uses less digits than its factorization.

684646422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114107742.

The product of its digits is 442368, while the sum is 42.

The square root of 684646422 is about 26165.7490242492. The cubic root of 684646422 is about 881.3642844793.

It can be divided in two parts, 6846464 and 22, that added together give a palindrome (6846486).

The spelling of 684646422 in words is "six hundred eighty-four million, six hundred forty-six thousand, four hundred twenty-two".