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28741200 = 2435243557
BaseRepresentation
bin110110110100…
…0111001010000
32000002012111220
41231220321100
524324204300
62504005040
7466203405
oct155507120
960065456
1028741200
1115250764
129760780
135c54037
143b622ac
1527cada0
hex1b68e50

28741200 has 120 divisors (see below), whose sum is σ = 94377888. Its totient is φ = 7472640.

The previous prime is 28741199. The next prime is 28741213. The reversal of 28741200 is 214782.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51322 + ... + 51878.

Almost surely, 228741200 is an apocalyptic number.

28741200 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 28741200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47188944).

28741200 is an abundant number, since it is smaller than the sum of its proper divisors (65636688).

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

28741200 is a wasteful number, since it uses less digits than its factorization.

28741200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 28741200 is about 5361.0819803469. The cubic root of 28741200 is about 306.3150243713.

Adding to 28741200 its reverse (214782), we get a palindrome (28955982).

The spelling of 28741200 in words is "twenty-eight million, seven hundred forty-one thousand, two hundred".

Divisors: 1 2 3 4 5 6 8 10 12 15 16 20 24 25 30 40 43 48 50 60 75 80 86 100 120 129 150 172 200 215 240 258 300 344 400 430 516 557 600 645 688 860 1032 1075 1114 1200 1290 1671 1720 2064 2150 2228 2580 2785 3225 3342 3440 4300 4456 5160 5570 6450 6684 8355 8600 8912 10320 11140 12900 13368 13925 16710 17200 22280 23951 25800 26736 27850 33420 41775 44560 47902 51600 55700 66840 71853 83550 95804 111400 119755 133680 143706 167100 191608 222800 239510 287412 334200 359265 383216 479020 574824 598775 668400 718530 958040 1149648 1197550 1437060 1796325 1916080 2395100 2874120 3592650 4790200 5748240 7185300 9580400 14370600 28741200