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4442 = 22221
BaseRepresentation
bin1000101011010
320002112
41011122
5120232
632322
715644
oct10532
96075
104442
113379
1226a2
132039
141894
1514b2
hex115a

4442 has 4 divisors (see below), whose sum is σ = 6666. Its totient is φ = 2220.

The previous prime is 4441. The next prime is 4447. The reversal of 4442 is 2444.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3481 + 961 = 59^2 + 31^2 .

It is a plaindrome in base 11 and base 16.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (4441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109 + ... + 1112.

24442 is an apocalyptic number.

4442 is a deficient number, since it is larger than the sum of its proper divisors (2224).

4442 is a wasteful number, since it uses less digits than its factorization.

4442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223.

The product of its digits is 128, while the sum is 14.

The square root of 4442 is about 66.6483308118. The cubic root of 4442 is about 16.4383990169.

Adding to 4442 its reverse (2444), we get a palindrome (6886).

It can be divided in two parts, 444 and 2, that multiplied together give a palindrome (888).

The spelling of 4442 in words is "four thousand, four hundred forty-two", and thus it is an iban number.

Divisors: 1 2 2221 4442