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228228800 = 2652672129
BaseRepresentation
bin11011001101001…
…11111011000000
3120220110020001112
431212213323000
5431411310200
634351422452
75440625042
oct1546477300
9526406045
10228228800
11107913748
1264524a28
133838c037
142244da92
1515083535
hexd9a7ec0

228228800 has 84 divisors (see below), whose sum is σ = 570235080. Its totient is φ = 89886720.

The previous prime is 228228797. The next prime is 228228809. The reversal of 228228800 is 8822822.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (228228809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106136 + ... + 108264.

Almost surely, 2228228800 is an apocalyptic number.

228228800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228228800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285117540).

228228800 is an abundant number, since it is smaller than the sum of its proper divisors (342006280).

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

228228800 is a wasteful number, since it uses less digits than its factorization.

228228800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2218 (or 2203 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 228228800 is about 15107.2432958498. The cubic root of 228228800 is about 611.1157577853.

The spelling of 228228800 in words is "two hundred twenty-eight million, two hundred twenty-eight thousand, eight hundred".

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 64 67 80 100 134 160 200 268 320 335 400 536 670 800 1072 1340 1600 1675 2129 2144 2680 3350 4258 4288 5360 6700 8516 10645 10720 13400 17032 21290 21440 26800 34064 42580 53225 53600 68128 85160 106450 107200 136256 142643 170320 212900 285286 340640 425800 570572 681280 713215 851600 1141144 1426430 1703200 2282288 2852860 3406400 3566075 4564576 5705720 7132150 9129152 11411440 14264300 22822880 28528600 45645760 57057200 114114400 228228800