678390912 has 48 divisors (see below), whose sum is σ = 1952143830. Its totient is φ = 226129920.

The previous prime is 678390859. The next prime is 678390941. The reversal of 678390912 is 219093876.

It can be written as a sum of positive squares in only one way, i.e., 497111616 + 181279296 = 22296^2 + 13464^2 .

It is a tau number, because it is divible by the number of its divisors (48).

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 5 ways as a sum of consecutive naturals, for example, 293289 + ... + 295592.

Almost surely, 2^678390912 is an apocalyptic number.

It is an amenable number.

678390912 is an abundant number, since it is smaller than the sum of its proper divisors (1273752918).

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

678390912 is a wasteful number, since it uses less digits than its factorization.

678390912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588901 (or 588886 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 678390912 is about 26045.9384933621. The cubic root of 678390912 is about 878.6717703474.

The spelling of 678390912 in words is "six hundred seventy-eight million, three hundred ninety thousand, nine hundred twelve".