67398 has 16 divisors (see below), whose sum is σ = 138240. Its totient is φ = 21896.

The previous prime is 67391. The next prime is 67399. The reversal of 67398 is 89376.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67391) by changing a digit.

67398 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163 + ... + 401.

It is an arithmetic number, because the mean of its divisors is an integer number (8640).

2⁶⁷³⁹⁸ is an apocalyptic number.

67398 is an abundant number, since it is smaller than the sum of its proper divisors (70842).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69120).

67398 is a wasteful number, since it uses less digits than its factorization.

67398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291.

The product of its digits is 9072, while the sum is 33.

The square root of 67398 is about 259.6112478303. The cubic root of 67398 is about 40.6957449767.

It can be divided in two parts, 67 and 398, that added together give a triangular number (465 = T₃₀).

The spelling of 67398 in words is "sixty-seven thousand, three hundred ninety-eight".