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8028102381 = 313788326113
BaseRepresentation
bin1110111101000001…
…10001111011101101
3202201111021212010020
413132200301323231
5112420143234011
63404342032353
7402641513205
oct73640617355
922644255106
108028102381
11344a722162
1216807186b9
139ac302450
14562301405
1531ebec006
hex1de831eed

8028102381 has 16 divisors (see below), whose sum is σ = 11529435456. Its totient is φ = 4939554816.

The previous prime is 8028102353. The next prime is 8028102421. The reversal of 8028102381 is 1832018208.

8028102381 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8028102381 - 25 = 8028102349 is a prime.

It is a super-2 number, since 2×80281023812 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8028102301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294381 + ... + 320493.

It is an arithmetic number, because the mean of its divisors is an integer number (720589716).

Almost surely, 28028102381 is an apocalyptic number.

It is an amenable number.

8028102381 is a deficient number, since it is larger than the sum of its proper divisors (3501333075).

8028102381 is a wasteful number, since it uses less digits than its factorization.

8028102381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34012.

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 8028102381 is about 89599.6784648249. The cubic root of 8028102381 is about 2002.3391282563.

The spelling of 8028102381 in words is "eight billion, twenty-eight million, one hundred two thousand, three hundred eighty-one".

Divisors: 1 3 13 39 7883 23649 26113 78339 102479 307437 339469 1018407 205848779 617546337 2676034127 8028102381