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220344 = 2339181
BaseRepresentation
bin110101110010111000
3102012020220
4311302320
524022334
64420040
71605255
oct656270
9365226
10220344
11140603
12a7620
13793a7
145a42c
1545449
hex35cb8

220344 has 16 divisors (see below), whose sum is σ = 550920. Its totient is φ = 73440.

The previous prime is 220333. The next prime is 220351. The reversal of 220344 is 443022.

It is a happy number.

It is a super-4 number, since 4×2203444 (a number of 22 digits) contains 4444 as substring.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

220344 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4567 + ... + 4614.

2220344 is an apocalyptic number.

220344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

220344 is an abundant number, since it is smaller than the sum of its proper divisors (330576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220344 is a wasteful number, since it uses less digits than its factorization.

220344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9190 (or 9186 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 220344 is about 469.4081379780. The cubic root of 220344 is about 60.3995555718.

Adding to 220344 its reverse (443022), we get a palindrome (663366).

The spelling of 220344 in words is "two hundred twenty thousand, three hundred forty-four", and thus it is an iban number.

Divisors: 1 2 3 4 6 8 12 24 9181 18362 27543 36724 55086 73448 110172 220344