678342 has 32 divisors (see below), whose sum is σ = 1603584. Its totient is φ = 187200.

The previous prime is 678341. The next prime is 678343. The reversal of 678342 is 243876.

678342 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (678341) and next prime (678343).

It is a super-3 number, since 3×678342³ = 936412877186333064, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1042 + ... + 1562.

It is an arithmetic number, because the mean of its divisors is an integer number (50112).

2⁶⁷⁸³⁴² is an apocalyptic number.

678342 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 678342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (801792).

678342 is an abundant number, since it is smaller than the sum of its proper divisors (925242).

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

678342 is a wasteful number, since it uses less digits than its factorization.

678342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564.

The product of its digits is 8064, while the sum is 30.

The square root of 678342 is about 823.6152014139. The cubic root of 678342 is about 87.8650652422.

The spelling of 678342 in words is "six hundred seventy-eight thousand, three hundred forty-two".