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4028289 = 32379739
BaseRepresentation
bin1111010111011110000001
321120122202220
433113132001
52012401124
6222201253
746145166
oct17273601
97518686
104028289
112301571
121423229
13ab0705
1476c06d
15548879
hex3d7781

4028289 has 16 divisors (see below), whose sum is σ = 5683200. Its totient is φ = 2532816.

The previous prime is 4028287. The next prime is 4028293. The reversal of 4028289 is 9828204.

It is not a de Polignac number, because 4028289 - 21 = 4028287 is a prime.

It is a super-2 number, since 2×40282892 = 32454224535042, which contains 22 as substring.

4028289 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4028281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5082 + ... + 5820.

It is an arithmetic number, because the mean of its divisors is an integer number (355200).

Almost surely, 24028289 is an apocalyptic number.

It is an amenable number.

4028289 is a deficient number, since it is larger than the sum of its proper divisors (1654911).

4028289 is a wasteful number, since it uses less digits than its factorization.

4028289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 4028289 is about 2007.0597898418. The cubic root of 4028289 is about 159.1134430320.

The spelling of 4028289 in words is "four million, twenty-eight thousand, two hundred eighty-nine".

Divisors: 1 3 23 69 79 237 739 1817 2217 5451 16997 50991 58381 175143 1342763 4028289