678657144 has 32 divisors (see below), whose sum is σ = 1850883840. Its totient is φ = 205653600.

The previous prime is 678657097. The next prime is 678657167. The reversal of 678657144 is 441756876.

It is a junction number, because it is equal to n+sod(n) for n = 678657093 and 678657102.

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, 1285072 + ... + 1285599.

It is an arithmetic number, because the mean of its divisors is an integer number (57840120).

Almost surely, 2^678657144 is an apocalyptic number.

It is an amenable number.

678657144 is an abundant number, since it is smaller than the sum of its proper divisors (1172226696).

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

678657144 is a wasteful number, since it uses less digits than its factorization.

678657144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570691 (or 2570687 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 48.

The square root of 678657144 is about 26051.0488080615. The cubic root of 678657144 is about 878.7866991412.

The spelling of 678657144 in words is "six hundred seventy-eight million, six hundred fifty-seven thousand, one hundred forty-four".