678950441 has 8 divisors (see below), whose sum is σ = 733677000. Its totient is φ = 624580992.

The previous prime is 678950423. The next prime is 678950507. The reversal of 678950441 is 144059876.

It can be written as a sum of positive squares in 4 ways, for example, as 324720400 + 354230041 = 18020^2 + 18821^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 678950441 - 2¹⁴ = 678934057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 678950392 and 678950401.

It is not an unprimeable number, because it can be changed into a prime (678950141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85316 + ... + 92933.

It is an arithmetic number, because the mean of its divisors is an integer number (91709625).

Almost surely, 2^678950441 is an apocalyptic number.

It is an amenable number.

678950441 is a deficient number, since it is larger than the sum of its proper divisors (54726559).

678950441 is a wasteful number, since it uses less digits than its factorization.

678950441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178555.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 678950441 is about 26056.6774743059. The cubic root of 678950441 is about 878.9132767430.

The spelling of 678950441 in words is "six hundred seventy-eight million, nine hundred fifty thousand, four hundred forty-one".