684477852 has 12 divisors (see below), whose sum is σ = 1597115016. Its totient is φ = 228159280.

The previous prime is 684477847. The next prime is 684477863. The reversal of 684477852 is 258774486.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 684477795 and 684477804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28519899 + ... + 28519922.

It is an arithmetic number, because the mean of its divisors is an integer number (133092918).

Almost surely, 2^684477852 is an apocalyptic number.

It is an amenable number.

684477852 is an abundant number, since it is smaller than the sum of its proper divisors (912637164).

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

684477852 is a wasteful number, since it uses less digits than its factorization.

684477852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57039828 (or 57039826 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 51.

The square root of 684477852 is about 26162.5276301813. The cubic root of 684477852 is about 881.2919435999.

The spelling of 684477852 in words is "six hundred eighty-four million, four hundred seventy-seven thousand, eight hundred fifty-two".