678840100 has 36 divisors (see below), whose sum is σ = 1486873584. Its totient is φ = 268994080.

The previous prime is 678840079. The next prime is 678840103. The reversal of 678840100 is 1048876.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (678840103) 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 11 ways as a sum of consecutive naturals, for example, 21022 + ... + 42421.

It is an arithmetic number, because the mean of its divisors is an integer number (41302044).

Almost surely, 2^678840100 is an apocalyptic number.

It is an amenable number.

678840100 is an abundant number, since it is smaller than the sum of its proper divisors (808033484).

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

678840100 is a wasteful number, since it uses less digits than its factorization.

678840100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63564 (or 63557 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 678840100 is about 26054.5600615324. The cubic root of 678840100 is about 878.8656613757.

Adding to 678840100 its reverse (1048876), we get a palindrome (679888976).

The spelling of 678840100 in words is "six hundred seventy-eight million, eight hundred forty thousand, one hundred".