678339445 has 8 divisors (see below), whose sum is σ = 930294144. Its totient is φ = 465147024.

The previous prime is 678339443. The next prime is 678339451. The reversal of 678339445 is 544933876.

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 678339445 - 2¹ = 678339443 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 (678339443) 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, 9690529 + ... + 9690598.

It is an arithmetic number, because the mean of its divisors is an integer number (116286768).

Almost surely, 2^678339445 is an apocalyptic number.

It is an amenable number.

678339445 is a deficient number, since it is larger than the sum of its proper divisors (251954699).

678339445 is a wasteful number, since it uses less digits than its factorization.

678339445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19381139.

The product of its digits is 2177280, while the sum is 49.

The square root of 678339445 is about 26044.9504702927. The cubic root of 678339445 is about 878.6495492637.

The spelling of 678339445 in words is "six hundred seventy-eight million, three hundred thirty-nine thousand, four hundred forty-five".