67428 has 18 divisors (see below), whose sum is σ = 170534. Its totient is φ = 22464.

The previous prime is 67427. The next prime is 67429. The reversal of 67428 is 82476.

It is an interprime number because it is at equal distance from previous prime (67427) and next prime (67429).

It can be written as a sum of positive squares in only one way, i.e., 39204 + 28224 = 198^2 + 168^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (67421) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 901 + ... + 972.

2⁶⁷⁴²⁸ is an apocalyptic number.

It is an amenable number.

67428 is an abundant number, since it is smaller than the sum of its proper divisors (103106).

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

67428 is a wasteful number, since it uses less digits than its factorization.

67428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883 (or 1878 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 67428 is about 259.6690201006. The cubic root of 67428 is about 40.7017822046.

The spelling of 67428 in words is "sixty-seven thousand, four hundred twenty-eight".