678135912 has 64 divisors (see below), whose sum is σ = 1755164160. Its totient is φ = 218112000.

The previous prime is 678135893. The next prime is 678135923. The reversal of 678135912 is 219531876.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297208 + ... + 299480.

It is an arithmetic number, because the mean of its divisors is an integer number (27424440).

Almost surely, 2^678135912 is an apocalyptic number.

678135912 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678135912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (877582080).

678135912 is an abundant number, since it is smaller than the sum of its proper divisors (1077028248).

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

678135912 is a wasteful number, since it uses less digits than its factorization.

678135912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2714 (or 2710 counting only the distinct ones).

The product of its digits is 90720, while the sum is 42.

The square root of 678135912 is about 26041.0428362614. The cubic root of 678135912 is about 878.5616620615.

The spelling of 678135912 in words is "six hundred seventy-eight million, one hundred thirty-five thousand, nine hundred twelve".