684168928 has 24 divisors (see below), whose sum is σ = 1393406280. Its totient is φ = 330288000.

The previous prime is 684168923. The next prime is 684168931. The reversal of 684168928 is 829861486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684168923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367698 + ... + 369553.

It is an arithmetic number, because the mean of its divisors is an integer number (58058595).

Almost surely, 2^684168928 is an apocalyptic number.

It is an amenable number.

684168928 is an abundant number, since it is smaller than the sum of its proper divisors (709237352).

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

684168928 is a wasteful number, since it uses less digits than its factorization.

684168928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737290 (or 737282 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 52.

The square root of 684168928 is about 26156.6230236244. The cubic root of 684168928 is about 881.1593397471.

The spelling of 684168928 in words is "six hundred eighty-four million, one hundred sixty-eight thousand, nine hundred twenty-eight".