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19428 = 2231619
BaseRepresentation
bin100101111100100
3222122120
410233210
51110203
6225540
7110433
oct45744
928576
1019428
1113662
12b2b0
138ac6
14711a
155b53
hex4be4

19428 has 12 divisors (see below), whose sum is σ = 45360. Its totient is φ = 6472.

The previous prime is 19427. The next prime is 19429. The reversal of 19428 is 82491.

19428 is digitally balanced in base 4, 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 (19427) and next prime (19429).

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

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 19398 and 19407.

It is not an unprimeable number, because it can be changed into a prime (19421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 798 + ... + 821.

It is an arithmetic number, because the mean of its divisors is an integer number (3780).

219428 is an apocalyptic number.

It is an amenable number.

19428 is an abundant number, since it is smaller than the sum of its proper divisors (25932).

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 (22680).

19428 is a wasteful number, since it uses less digits than its factorization.

19428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626 (or 1624 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 19428 is about 139.3843606722. The cubic root of 19428 is about 26.8828947421.

It can be divided in two parts, 194 and 28, that added together give a palindrome (222).

The spelling of 19428 in words is "nineteen thousand, four hundred twenty-eight".

Divisors: 1 2 3 4 6 12 1619 3238 4857 6476 9714 19428