678044838 has 8 divisors (see below), whose sum is σ = 1356089688. Its totient is φ = 226014944.

The previous prime is 678044833. The next prime is 678044909. The reversal of 678044838 is 838440876.

It is a sphenic number, since it is the product of 3 distinct primes.

678044838 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678044833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56503731 + ... + 56503742.

It is an arithmetic number, because the mean of its divisors is an integer number (169511211).

Almost surely, 2^678044838 is an apocalyptic number.

678044838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

678044838 is a wasteful number, since it uses less digits than its factorization.

678044838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113007478.

The product of its (nonzero) digits is 1032192, while the sum is 48.

The square root of 678044838 is about 26039.2941148565. The cubic root of 678044838 is about 878.5223298738.

The spelling of 678044838 in words is "six hundred seventy-eight million, forty-four thousand, eight hundred thirty-eight".