678800399 has 8 divisors (see below), whose sum is σ = 692219520. Its totient is φ = 665488600.

The previous prime is 678800393. The next prime is 678800453. The reversal of 678800399 is 993008876.

678800399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678800399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678800393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13997 + ... + 39414.

It is an arithmetic number, because the mean of its divisors is an integer number (86527440).

Almost surely, 2^678800399 is an apocalyptic number.

678800399 is a deficient number, since it is larger than the sum of its proper divisors (13419121).

678800399 is a wasteful number, since it uses less digits than its factorization.

678800399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53661.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 678800399 is about 26053.7981684053. The cubic root of 678800399 is about 878.8485279713.

The spelling of 678800399 in words is "six hundred seventy-eight million, eight hundred thousand, three hundred ninety-nine".