678396312 has 96 divisors (see below), whose sum is σ = 2069084160. Its totient is φ = 198936000.

The previous prime is 678396289. The next prime is 678396317. The reversal of 678396312 is 213693876.

678396312 is a `hidden beast` number, since 6 + 7 + 8 + 3 + 9 + 631 + 2 = 666.

It is a super-2 number, since 2×678396312² = 920443112270402688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678396317) 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 23 ways as a sum of consecutive naturals, for example, 10737 + ... + 38367.

It is an arithmetic number, because the mean of its divisors is an integer number (21552960).

Almost surely, 2^678396312 is an apocalyptic number.

678396312 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 678396312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1034542080).

678396312 is an abundant number, since it is smaller than the sum of its proper divisors (1390687848).

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

678396312 is a wasteful number, since it uses less digits than its factorization.

678396312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27685 (or 27678 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 678396312 is about 26046.0421561511. The cubic root of 678396312 is about 878.6741017539.

The spelling of 678396312 in words is "six hundred seventy-eight million, three hundred ninety-six thousand, three hundred twelve".