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8031228 = 2234011669
BaseRepresentation
bin11110101000101111111100
3120010000202220
4132220233330
54023444403
6444045340
7125156442
oct36505774
916100686
108031228
114595a87
122833850
13188270a
1410d0b92
15a89953
hex7a8bfc

8031228 has 24 divisors (see below), whose sum is σ = 18797520. Its totient is φ = 2668800.

The previous prime is 8031227. The next prime is 8031253. The reversal of 8031228 is 8221308.

It is a junction number, because it is equal to n+sod(n) for n = 8031198 and 8031207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8031227) 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, 3978 + ... + 5646.

It is an arithmetic number, because the mean of its divisors is an integer number (783230).

Almost surely, 28031228 is an apocalyptic number.

It is an amenable number.

8031228 is an abundant number, since it is smaller than the sum of its proper divisors (10766292).

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

8031228 is a wasteful number, since it uses less digits than its factorization.

8031228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077 (or 2075 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 8031228 is about 2833.9421306724. The cubic root of 8031228 is about 200.2598954588.

The spelling of 8031228 in words is "eight million, thirty-one thousand, two hundred twenty-eight".

Divisors: 1 2 3 4 6 12 401 802 1203 1604 1669 2406 3338 4812 5007 6676 10014 20028 669269 1338538 2007807 2677076 4015614 8031228