678223389 has 8 divisors (see below), whose sum is σ = 905544640. Its totient is φ = 451525536.

The previous prime is 678223369. The next prime is 678223393. The reversal of 678223389 is 983322876.

It is a happy number.

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

It is not a de Polignac number, because 678223389 - 2¹² = 678219293 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 (678223369) 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, 153304 + ... + 157665.

It is an arithmetic number, because the mean of its divisors is an integer number (113193080).

Almost surely, 2^678223389 is an apocalyptic number.

It is an amenable number.

678223389 is a deficient number, since it is larger than the sum of its proper divisors (227321251).

678223389 is a wasteful number, since it uses less digits than its factorization.

678223389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311699.

The product of its digits is 870912, while the sum is 48.

The square root of 678223389 is about 26042.7223807343. The cubic root of 678223389 is about 878.5994374950.

The spelling of 678223389 in words is "six hundred seventy-eight million, two hundred twenty-three thousand, three hundred eighty-nine".