678085452 has 144 divisors (see below), whose sum is σ = 2034793600. Its totient is φ = 194594400.

The previous prime is 678085423. The next prime is 678085469. The reversal of 678085452 is 254580876.

It is a junction number, because it is equal to n+sod(n) for n = 678085398 and 678085407.

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 47 ways as a sum of consecutive naturals, for example, 246927 + ... + 249657.

Almost surely, 2^678085452 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678085452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1017396800).

678085452 is an abundant number, since it is smaller than the sum of its proper divisors (1356708148).

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

678085452 is a wasteful number, since it uses less digits than its factorization.

678085452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2785 (or 2766 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The square root of 678085452 is about 26040.0739630286. The cubic root of 678085452 is about 878.5398703035.

The spelling of 678085452 in words is "six hundred seventy-eight million, eighty-five thousand, four hundred fifty-two".