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28808600008000 = 26533601075001
BaseRepresentation
bin1101000110011100001100…
…10111101011010101000000
310210000002000212102022122111
412203032012113223111000
512234000003100224000
6141134253234345104
76032231651504611
oct643160627532500
9123002025368574
1028808600008000
1191a772773629a
123293371a2b194
13130c840796a97
147184b50b5c08
1534e5a0108cba
hex1a33865eb540

28808600008000 has 56 divisors (see below), whose sum is σ = 71344497939624. Its totient is φ = 11523440000000.

The previous prime is 28808600007973. The next prime is 28808600008031. The reversal of 28808600008000 is 80000680882.

It can be written as a sum of positive squares in 4 ways, for example, as 1346472461376 + 27462127546624 = 1160376^2 + 5240432^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1800529501 + ... + 1800545500.

It is an arithmetic number, because the mean of its divisors is an integer number (1274008891779).

Almost surely, 228808600008000 is an apocalyptic number.

28808600008000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28808600008000 is an abundant number, since it is smaller than the sum of its proper divisors (42535897931624).

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

28808600008000 is an equidigital number, since it uses as much as digits as its factorization.

28808600008000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3601075028 (or 3601075008 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 40.

Adding to 28808600008000 its reverse (80000680882), we get a palindrome (28888600688882).

The spelling of 28808600008000 in words is "twenty-eight trillion, eight hundred eight billion, six hundred million, eight thousand".

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 160 200 250 320 400 500 800 1000 1600 2000 4000 8000 3601075001 7202150002 14404300004 18005375005 28808600008 36010750010 57617200016 72021500020 90026875025 115234400032 144043000040 180053750050 230468800064 288086000080 360107500100 450134375125 576172000160 720215000200 900268750250 1152344000320 1440430000400 1800537500500 2880860000800 3601075001000 5761720001600 7202150002000 14404300004000 28808600008000