678231342 has 12 divisors (see below), whose sum is σ = 1469501280. Its totient is φ = 226077108.

The previous prime is 678231341. The next prime is 678231343. The reversal of 678231342 is 243132876.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (678231341) and next prime (678231343).

It is a super-4 number, since 4×678231342⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 678231297 and 678231306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678231341) 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 5 ways as a sum of consecutive naturals, for example, 18839742 + ... + 18839777.

It is an arithmetic number, because the mean of its divisors is an integer number (122458440).

Almost surely, 2^678231342 is an apocalyptic number.

678231342 is an abundant number, since it is smaller than the sum of its proper divisors (791269938).

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

678231342 is a wasteful number, since it uses less digits than its factorization.

678231342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37679527 (or 37679524 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 678231342 is about 26042.8750716967. The cubic root of 678231342 is about 878.6028716998.

The spelling of 678231342 in words is "six hundred seventy-eight million, two hundred thirty-one thousand, three hundred forty-two".