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428224 = 266691
BaseRepresentation
bin1101000100011000000
3210202102011
41220203000
5102200344
613102304
73432316
oct1504300
9722364
10428224
11272805
12187994
1311cbb4
14b20b6
1586d34
hex688c0

428224 has 14 divisors (see below), whose sum is σ = 849884. Its totient is φ = 214080.

The previous prime is 428221. The next prime is 428227. The reversal of 428224 is 422824.

428224 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (428221) and next prime (428227).

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a d-powerful number, because it can be written as 43 + 27 + 211 + 85 + 217 + 49 .

It is a junction number, because it is equal to n+sod(n) for n = 428195 and 428204.

It is not an unprimeable number, because it can be changed into a prime (428221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3282 + ... + 3409.

It is an arithmetic number, because the mean of its divisors is an integer number (60706).

2428224 is an apocalyptic number.

It is an amenable number.

428224 is a deficient number, since it is larger than the sum of its proper divisors (421660).

428224 is an equidigital number, since it uses as much as digits as its factorization.

428224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6703 (or 6693 counting only the distinct ones).

The product of its digits is 1024, while the sum is 22.

The square root of 428224 is about 654.3882639534. The cubic root of 428224 is about 75.3743652698.

It can be divided in two parts, 4 and 28224, that multiplied together give a square (112896 = 3362).

The spelling of 428224 in words is "four hundred twenty-eight thousand, two hundred twenty-four".

Divisors: 1 2 4 8 16 32 64 6691 13382 26764 53528 107056 214112 428224