678428547 has 8 divisors (see below), whose sum is σ = 904780800. Its totient is φ = 452181000.

The previous prime is 678428489. The next prime is 678428549. The reversal of 678428547 is 745824876.

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

It is not a de Polignac number, because 678428547 - 2⁷ = 678428419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 678428547.

It is not an unprimeable number, because it can be changed into a prime (678428549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9547 + ... + 38052.

It is an arithmetic number, because the mean of its divisors is an integer number (113097600).

Almost surely, 2^678428547 is an apocalyptic number.

678428547 is a deficient number, since it is larger than the sum of its proper divisors (226352253).

678428547 is a wasteful number, since it uses less digits than its factorization.

678428547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52353.

The product of its digits is 3010560, while the sum is 51.

The square root of 678428547 is about 26046.6609568290. The cubic root of 678428547 is about 878.6880186982.

The spelling of 678428547 in words is "six hundred seventy-eight million, four hundred twenty-eight thousand, five hundred forty-seven".