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8128051448 = 2311312979491
BaseRepresentation
bin1111001000111100…
…00011100011111000
3202222110100210110112
413210132003203320
5113121240121243
63422312203452
7405264203666
oct74436034370
922873323415
108128051448
1134a10893a0
1216aa099588
139c6c289ca
145716bbc36
15328891818
hex1e47838f8

8128051448 has 32 divisors (see below), whose sum is σ = 17161873920. Its totient is φ = 3575388000.

The previous prime is 8128051447. The next prime is 8128051471. The reversal of 8128051448 is 8441508218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8128051447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1487018 + ... + 1492473.

It is an arithmetic number, because the mean of its divisors is an integer number (536308560).

Almost surely, 28128051448 is an apocalyptic number.

8128051448 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

8128051448 is an abundant number, since it is smaller than the sum of its proper divisors (9033822472).

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

8128051448 is a wasteful number, since it uses less digits than its factorization.

8128051448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2979539 (or 2979535 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 41.

The square root of 8128051448 is about 90155.7066857112. The cubic root of 8128051448 is about 2010.6145203194.

The spelling of 8128051448 in words is "eight billion, one hundred twenty-eight million, fifty-one thousand, four hundred forty-eight".

Divisors: 1 2 4 8 11 22 31 44 62 88 124 248 341 682 1364 2728 2979491 5958982 11917964 23835928 32774401 65548802 92364221 131097604 184728442 262195208 369456884 738913768 1016006431 2032012862 4064025724 8128051448