178428 has 12 divisors (see below), whose sum is σ = 416360. Its totient is φ = 59472.

The previous prime is 178417. The next prime is 178439. The reversal of 178428 is 824871.

It is an interprime number because it is at equal distance from previous prime (178417) and next prime (178439).

It is a tau number, because it is divible by the number of its divisors (12).

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 178395 and 178404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7423 + ... + 7446.

2¹⁷⁸⁴²⁸ is an apocalyptic number.

It is an amenable number.

178428 is an abundant number, since it is smaller than the sum of its proper divisors (237932).

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

178428 is a wasteful number, since it uses less digits than its factorization.

178428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14876 (or 14874 counting only the distinct ones).

The product of its digits is 3584, while the sum is 30.

The square root of 178428 is about 422.4073862991. The cubic root of 178428 is about 56.2973132789.

It can be divided in two parts, 178 and 428, that added together give a palindrome (606).

The spelling of 178428 in words is "one hundred seventy-eight thousand, four hundred twenty-eight".