678378040 has 32 divisors (see below), whose sum is σ = 1532007360. Its totient is φ = 270345600.

The previous prime is 678378037. The next prime is 678378059. The reversal of 678378040 is 40873876.

678378040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20451 + ... + 42130.

It is an arithmetic number, because the mean of its divisors is an integer number (47875230).

Almost surely, 2^678378040 is an apocalyptic number.

It is an amenable number.

678378040 is an abundant number, since it is smaller than the sum of its proper divisors (853629320).

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

678378040 is a wasteful number, since it uses less digits than its factorization.

678378040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62863 (or 62859 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 678378040 is about 26045.6913903240. The cubic root of 678378040 is about 878.6662129152. Note that the first 3 decimals are identical.

The spelling of 678378040 in words is "six hundred seventy-eight million, three hundred seventy-eight thousand, forty".