684814648 has 32 divisors (see below), whose sum is σ = 1507125600. Its totient is φ = 285558912.

The previous prime is 684814633. The next prime is 684814681. The reversal of 684814648 is 846418486.

It is a happy number.

It is a super-2 number, since 2×684814648² = 937942204230727808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 163183 + ... + 167326.

It is an arithmetic number, because the mean of its divisors is an integer number (47097675).

Almost surely, 2^684814648 is an apocalyptic number.

It is an amenable number.

684814648 is an abundant number, since it is smaller than the sum of its proper divisors (822310952).

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

684814648 is a wasteful number, since it uses less digits than its factorization.

684814648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330559 (or 330555 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 49.

The square root of 684814648 is about 26168.9634490937. The cubic root of 684814648 is about 881.4364658960.

The spelling of 684814648 in words is "six hundred eighty-four million, eight hundred fourteen thousand, six hundred forty-eight".