678005000 has 40 divisors (see below), whose sum is σ = 1588577430. Its totient is φ = 271200000.

The previous prime is 678004993. The next prime is 678005011. The reversal of 678005000 is 500876.

It can be written as a sum of positive squares in 5 ways, for example, as 27556 + 677977444 = 166^2 + 26038^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 62801 + ... + 72800.

Almost surely, 2^678005000 is an apocalyptic number.

It is an amenable number.

678005000 is an abundant number, since it is smaller than the sum of its proper divisors (910572430).

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

678005000 is a wasteful number, since it uses less digits than its factorization.

678005000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135627 (or 135608 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 678005000 is about 26038.5291443276. The cubic root of 678005000 is about 878.5051239035.

Adding to 678005000 its reverse (500876), we get a palindrome (678505876).

The spelling of 678005000 in words is "six hundred seventy-eight million, five thousand".