678324672 has 56 divisors (see below), whose sum is σ = 1994154000. Its totient is φ = 226107648.

The previous prime is 678324631. The next prime is 678324679. The reversal of 678324672 is 276423876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678324679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194547 + ... + 198002.

Almost surely, 2^678324672 is an apocalyptic number.

It is an amenable number.

678324672 is an abundant number, since it is smaller than the sum of its proper divisors (1315829328).

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

678324672 is a wasteful number, since it uses less digits than its factorization.

678324672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392570 (or 392554 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 678324672 is about 26044.6668629107. Note that the first 3 decimals coincide. The cubic root of 678324672 is about 878.6431707541.

The spelling of 678324672 in words is "six hundred seventy-eight million, three hundred twenty-four thousand, six hundred seventy-two".