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87420020748 = 223411072916561
BaseRepresentation
bin101000101101010100…
…0111010100000001100
322100122110012011221020
41101122220322200030
52413014011130443
6104054334234140
76213230626104
oct1213250724014
9270573164836
1087420020748
1134090360535
1214b38955950
13832246c038
1443343cc204
152419b03583
hex145aa3a80c

87420020748 has 48 divisors (see below), whose sum is σ = 208987265760. Its totient is φ = 28424908800.

The previous prime is 87420020711. The next prime is 87420020767. The reversal of 87420020748 is 84702002478.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5270388 + ... + 5286948.

It is an arithmetic number, because the mean of its divisors is an integer number (4353901370).

Almost surely, 287420020748 is an apocalyptic number.

It is an amenable number.

87420020748 is an abundant number, since it is smaller than the sum of its proper divisors (121567245012).

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

87420020748 is a wasteful number, since it uses less digits than its factorization.

87420020748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27338 (or 27336 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 42.

The spelling of 87420020748 in words is "eighty-seven billion, four hundred twenty million, twenty thousand, seven hundred forty-eight".

Divisors: 1 2 3 4 6 12 41 82 123 164 246 492 10729 16561 21458 32187 33122 42916 49683 64374 66244 99366 128748 198732 439889 679001 879778 1319667 1358002 1759556 2037003 2639334 2716004 4074006 5278668 8148012 177682969 355365938 533048907 710731876 1066097814 2132195628 7285001729 14570003458 21855005187 29140006916 43710010374 87420020748