678408140 has 24 divisors (see below), whose sum is σ = 1459406592. Its totient is φ = 264744320.

The previous prime is 678408139. The next prime is 678408151. The reversal of 678408140 is 41804876.

It is a junction number, because it is equal to n+sod(n) for n = 678408094 and 678408103.

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, 412844 + ... + 414483.

It is an arithmetic number, because the mean of its divisors is an integer number (60808608).

Almost surely, 2^678408140 is an apocalyptic number.

It is an amenable number.

678408140 is an abundant number, since it is smaller than the sum of its proper divisors (780998452).

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

678408140 is a wasteful number, since it uses less digits than its factorization.

678408140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827377 (or 827375 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 678408140 is about 26046.2692146111. The cubic root of 678408140 is about 878.6792083544.

The spelling of 678408140 in words is "six hundred seventy-eight million, four hundred eight thousand, one hundred forty".