678468422 has 4 divisors (see below), whose sum is σ = 1017702636. Its totient is φ = 339234210.

The previous prime is 678468407. The next prime is 678468457. The reversal of 678468422 is 224864876.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 169617104 + ... + 169617107.

It is an arithmetic number, because the mean of its divisors is an integer number (254425659).

Almost surely, 2^678468422 is an apocalyptic number.

678468422 is a deficient number, since it is larger than the sum of its proper divisors (339234214).

678468422 is a wasteful number, since it uses less digits than its factorization.

678468422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339234213.

The product of its digits is 1032192, while the sum is 47.

The square root of 678468422 is about 26047.4263987827. The cubic root of 678468422 is about 878.7052334801.

The spelling of 678468422 in words is "six hundred seventy-eight million, four hundred sixty-eight thousand, four hundred twenty-two".