678510012 has 24 divisors (see below), whose sum is σ = 1600981200. Its totient is φ = 223628416.

The previous prime is 678510011. The next prime is 678510023. The reversal of 678510012 is 210015876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678510011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316587 + ... + 318722.

It is an arithmetic number, because the mean of its divisors is an integer number (66707550).

Almost surely, 2^678510012 is an apocalyptic number.

It is an amenable number.

678510012 is an abundant number, since it is smaller than the sum of its proper divisors (922471188).

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

678510012 is a wasteful number, since it uses less digits than its factorization.

678510012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635405 (or 635403 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 678510012 is about 26048.2247379740. The cubic root of 678510012 is about 878.7231879408.

Adding to 678510012 its reverse (210015876), we get a palindrome (888525888).

The spelling of 678510012 in words is "six hundred seventy-eight million, five hundred ten thousand, twelve".