678419612 has 24 divisors (see below), whose sum is σ = 1353771216. Its totient is φ = 294697728.

The previous prime is 678419603. The next prime is 678419627. The reversal of 678419612 is 216914876.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382838 + ... + 384605.

It is an arithmetic number, because the mean of its divisors is an integer number (56407134).

Almost surely, 2^678419612 is an apocalyptic number.

It is an amenable number.

678419612 is a deficient number, since it is larger than the sum of its proper divisors (675351604).

678419612 is a wasteful number, since it uses less digits than its factorization.

678419612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767477 (or 767475 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 678419612 is about 26046.4894371583. The cubic root of 678419612 is about 878.6841611994.

The spelling of 678419612 in words is "six hundred seventy-eight million, four hundred nineteen thousand, six hundred twelve".