678840873 has 16 divisors (see below), whose sum is σ = 956148480. Its totient is φ = 427216464.

The previous prime is 678840857. The next prime is 678840893. The reversal of 678840873 is 378048876.

It is not a de Polignac number, because 678840873 - 2⁴ = 678840857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678840803) 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 15 ways as a sum of consecutive naturals, for example, 4911 + ... + 37172.

It is an arithmetic number, because the mean of its divisors is an integer number (59759280).

Almost surely, 2^678840873 is an apocalyptic number.

It is an amenable number.

678840873 is a deficient number, since it is larger than the sum of its proper divisors (277307607).

678840873 is a wasteful number, since it uses less digits than its factorization.

678840873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42388.

The product of its (nonzero) digits is 1806336, while the sum is 51.

The square root of 678840873 is about 26054.5748957837. The cubic root of 678840873 is about 878.8659949657.

The spelling of 678840873 in words is "six hundred seventy-eight million, eight hundred forty thousand, eight hundred seventy-three".