219428 has 12 divisors (see below), whose sum is σ = 418992. Its totient is φ = 99720.

The previous prime is 219409. The next prime is 219433. The reversal of 219428 is 824912.

It is a nialpdrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 219397 and 219406.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 219428.

It is an unprimeable number.

219428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2450 + ... + 2537.

It is an arithmetic number, because the mean of its divisors is an integer number (34916).

2²¹⁹⁴²⁸ is an apocalyptic number.

It is an amenable number.

219428 is a deficient number, since it is larger than the sum of its proper divisors (199564).

219428 is a wasteful number, since it uses less digits than its factorization.

219428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5002 (or 5000 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 219428 is about 468.4314250774. The cubic root of 219428 is about 60.3157429328.

It can be divided in two parts, 2194 and 28, that added together give a palindrome (2222).

The spelling of 219428 in words is "two hundred nineteen thousand, four hundred twenty-eight".