678339234 has 24 divisors (see below), whose sum is σ = 1474442892. Its totient is φ = 225388800.

The previous prime is 678339229. The next prime is 678339239. The reversal of 678339234 is 432933876.

It is an interprime number because it is at equal distance from previous prime (678339229) and next prime (678339239).

It can be written as a sum of positive squares in 2 ways, for example, as 422179209 + 256160025 = 20547^2 + 16005^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 678339234.

It is not an unprimeable number, because it can be changed into a prime (678339239) 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 11 ways as a sum of consecutive naturals, for example, 54567 + ... + 65834.

Almost surely, 2^678339234 is an apocalyptic number.

678339234 is an abundant number, since it is smaller than the sum of its proper divisors (796103658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678339234 is a wasteful number, since it uses less digits than its factorization.

678339234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120722 (or 120719 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 678339234 is about 26044.9464196032. The cubic root of 678339234 is about 878.6494581613.

The spelling of 678339234 in words is "six hundred seventy-eight million, three hundred thirty-nine thousand, two hundred thirty-four".