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76000081 = 1747731303
BaseRepresentation
bin1001000011110…
…10101101010001
312022000012111211
410201322231101
5123424000311
611312540121
71611663403
oct441725521
9168005454
1076000081
1139999a93
1221551641
131298c881
14a144b73
156a13821
hex487ab51

76000081 has 16 divisors (see below), whose sum is σ = 83372544. Its totient is φ = 68995584.

The previous prime is 76000069. The next prime is 76000087. The reversal of 76000081 is 18000067.

It is a cyclic number.

It is not a de Polignac number, because 76000081 - 27 = 75999953 is a prime.

It is a super-2 number, since 2×760000812 = 11552024624013122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76000087) by changing a digit.

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, 57676 + ... + 58978.

It is an arithmetic number, because the mean of its divisors is an integer number (5210784).

Almost surely, 276000081 is an apocalyptic number.

It is an amenable number.

76000081 is a deficient number, since it is larger than the sum of its proper divisors (7372463).

76000081 is a wasteful number, since it uses less digits than its factorization.

76000081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 76000081 is about 8717.8025327487. The cubic root of 76000081 is about 423.5825089086.

The spelling of 76000081 in words is "seventy-six million, eighty-one", and thus it is an aban number and an uban number.

Divisors: 1 17 47 73 799 1241 1303 3431 22151 58327 61241 95119 1041097 1617023 4470593 76000081