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440441 is a prime number
BaseRepresentation
bin1101011100001111001
3211101011122
41223201321
5103043231
613235025
73513041
oct1534171
9741148
10440441
11280a01
12192a75
13125621
14b6721
158a77b
hex6b879

440441 has 2 divisors, whose sum is σ = 440442. Its totient is φ = 440440.

The previous prime is 440431. The next prime is 440443. The reversal of 440441 is 144044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364816 + 75625 = 604^2 + 275^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-440441 is a prime.

It is a Sophie Germain prime.

Together with 440443, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (440443) by changing a digit.

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 as a sum of consecutive naturals, namely, 220220 + 220221.

It is an arithmetic number, because the mean of its divisors is an integer number (220221).

2440441 is an apocalyptic number.

It is an amenable number.

440441 is a deficient number, since it is larger than the sum of its proper divisors (1).

440441 is an equidigital number, since it uses as much as digits as its factorization.

440441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 440441 is about 663.6572910773. The cubic root of 440441 is about 76.0844513674.

Adding to 440441 its reverse (144044), we get a palindrome (584485).

The spelling of 440441 in words is "four hundred forty thousand, four hundred forty-one", and thus it is an iban number.