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8248420 = 225616761
BaseRepresentation
bin11111011101110001100100
3120112001201001
4133131301210
54102422140
6452443044
7130052605
oct37356144
916461631
108248420
114724184
122919484
13192a52b
141149dac
15acde9a
hex7ddc64

8248420 has 24 divisors (see below), whose sum is σ = 17608248. Its totient is φ = 3244800.

The previous prime is 8248403. The next prime is 8248423. The reversal of 8248420 is 248428.

It can be written as a sum of positive squares in 4 ways, for example, as 262144 + 7986276 = 512^2 + 2826^2 .

It is not an unprimeable number, because it can be changed into a prime (8248423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2161 + ... + 4600.

It is an arithmetic number, because the mean of its divisors is an integer number (733677).

Almost surely, 28248420 is an apocalyptic number.

It is an amenable number.

8248420 is an abundant number, since it is smaller than the sum of its proper divisors (9359828).

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

8248420 is a wasteful number, since it uses less digits than its factorization.

8248420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6831 (or 6829 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 8248420 is about 2872.0062674026. The cubic root of 8248420 is about 202.0491008960.

It can be divided in two parts, 8248 and 420, that added together give a palindrome (8668).

The spelling of 8248420 in words is "eight million, two hundred forty-eight thousand, four hundred twenty".

Divisors: 1 2 4 5 10 20 61 122 244 305 610 1220 6761 13522 27044 33805 67610 135220 412421 824842 1649684 2062105 4124210 8248420