678891832 has 8 divisors (see below), whose sum is σ = 1272922200. Its totient is φ = 339445912.

The previous prime is 678891823. The next prime is 678891859. The reversal of 678891832 is 238198876.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 678891832.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 42430732 + ... + 42430747.

It is an arithmetic number, because the mean of its divisors is an integer number (159115275).

Almost surely, 2^678891832 is an apocalyptic number.

It is an amenable number.

678891832 is a deficient number, since it is larger than the sum of its proper divisors (594030368).

678891832 is a wasteful number, since it uses less digits than its factorization.

678891832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84861485 (or 84861481 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 52.

The square root of 678891832 is about 26055.5528054962. The cubic root of 678891832 is about 878.8879858885.

The spelling of 678891832 in words is "six hundred seventy-eight million, eight hundred ninety-one thousand, eight hundred thirty-two".