684427536 has 160 divisors (see below), whose sum is σ = 2161528320. Its totient is φ = 206032896.

The previous prime is 684427453. The next prime is 684427547. The reversal of 684427536 is 635724486.

It is a junction number, because it is equal to n+sod(n) for n = 684427491 and 684427500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262656 + ... + 265248.

It is an arithmetic number, because the mean of its divisors is an integer number (13509552).

Almost surely, 2^684427536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684427536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080764160).

684427536 is an abundant number, since it is smaller than the sum of its proper divisors (1477100784).

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

684427536 is a wasteful number, since it uses less digits than its factorization.

684427536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2670 (or 2658 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The square root of 684427536 is about 26161.5660081731. The cubic root of 684427536 is about 881.2703484663.

The spelling of 684427536 in words is "six hundred eighty-four million, four hundred twenty-seven thousand, five hundred thirty-six".