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19444 = 224861
BaseRepresentation
bin100101111110100
3222200011
410233310
51110234
6230004
7110455
oct45764
928604
1019444
1113677
12b304
138b09
14712c
155b64
hex4bf4

19444 has 6 divisors (see below), whose sum is σ = 34034. Its totient is φ = 9720.

The previous prime is 19441. The next prime is 19447. The reversal of 19444 is 44491.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19441) and next prime (19447).

It can be written as a sum of positive squares in only one way, i.e., 19044 + 400 = 138^2 + 20^2 .

It is a plaindrome in base 11.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2427 + ... + 2434.

219444 is an apocalyptic number.

It is an amenable number.

19444 is a deficient number, since it is larger than the sum of its proper divisors (14590).

19444 is a wasteful number, since it uses less digits than its factorization.

19444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4865 (or 4863 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 19444 is about 139.4417441084. The cubic root of 19444 is about 26.8902725524.

It can be divided in two parts, 1944 and 4, that multiplied together give a 5-th power (7776 = 65).

The spelling of 19444 in words is "nineteen thousand, four hundred forty-four".

Divisors: 1 2 4 4861 9722 19444