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197812840 = 23559791061
BaseRepresentation
bin10111100101001…
…10001001101000
3111210012221012111
423302212021220
5401120002330
631343452104
74621244551
oct1362461150
9453187174
10197812840
11a1729795
12562b7034
1331c9c924
141c3b3328
151257632a
hexbca6268

197812840 has 64 divisors (see below), whose sum is σ = 458784000. Its totient is φ = 76727040.

The previous prime is 197812837. The next prime is 197812859. The reversal of 197812840 is 48218791.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 197812793 and 197812802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185910 + ... + 186970.

It is an arithmetic number, because the mean of its divisors is an integer number (7168500).

Almost surely, 2197812840 is an apocalyptic number.

197812840 is a gapful number since it is divisible by the number (10) 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 197812840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229392000).

197812840 is an abundant number, since it is smaller than the sum of its proper divisors (260971160).

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

197812840 is a wasteful number, since it uses less digits than its factorization.

197812840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210 (or 1206 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 197812840 is about 14064.5952661284. The cubic root of 197812840 is about 582.6639643540.

The spelling of 197812840 in words is "one hundred ninety-seven million, eight hundred twelve thousand, eight hundred forty".

Divisors: 1 2 4 5 8 10 20 40 59 79 118 158 236 295 316 395 472 590 632 790 1061 1180 1580 2122 2360 3160 4244 4661 5305 8488 9322 10610 18644 21220 23305 37288 42440 46610 62599 83819 93220 125198 167638 186440 250396 312995 335276 419095 500792 625990 670552 838190 1251980 1676380 2503960 3352760 4945321 9890642 19781284 24726605 39562568 49453210 98906420 197812840