678308478 has 32 divisors (see below), whose sum is σ = 1367749152. Its totient is φ = 224256000.

The previous prime is 678308467. The next prime is 678308503. The reversal of 678308478 is 874803876.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 678308478.

It is a congruent number.

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, 422878 + ... + 424478.

It is an arithmetic number, because the mean of its divisors is an integer number (42742161).

Almost surely, 2^678308478 is an apocalyptic number.

678308478 is an abundant number, since it is smaller than the sum of its proper divisors (689440674).

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

678308478 is a wasteful number, since it uses less digits than its factorization.

678308478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140.

The product of its (nonzero) digits is 1806336, while the sum is 51.

The square root of 678308478 is about 26044.3559720720. The cubic root of 678308478 is about 878.6361785957.

The spelling of 678308478 in words is "six hundred seventy-eight million, three hundred eight thousand, four hundred seventy-eight".