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220448 = 25832
BaseRepresentation
bin110101110100100000
3102012101202
4311310200
524023243
64420332
71605464
oct656440
9365352
10220448
11140698
12a76a8
1379457
145a4a4
15454b8
hex35d20

220448 has 18 divisors (see below), whose sum is σ = 439299. Its totient is φ = 108896.

The previous prime is 220447. The next prime is 220469. The reversal of 220448 is 844022.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

220448 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 110224 + 110224 = 332^2 + 332^2 .

It is an ABA number since it can be written as A⋅BA, here for A=2, B=332.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220447) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2615 + ... + 2697.

2220448 is an apocalyptic number.

It is an amenable number.

220448 is a deficient number, since it is larger than the sum of its proper divisors (218851).

220448 is an frugal number, since it uses more digits than its factorization.

220448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 220448 is about 469.5189027079. The cubic root of 220448 is about 60.4090567242.

Multiplying 220448 by its product of nonzero digits (512), we get a square (112869376 = 106242).

The spelling of 220448 in words is "two hundred twenty thousand, four hundred forty-eight".

Divisors: 1 2 4 8 16 32 83 166 332 664 1328 2656 6889 13778 27556 55112 110224 220448