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8286490681 = 73138186593
BaseRepresentation
bin1111011011110100…
…11101000000111001
3210101111111100020021
413231322131000321
5113432320200211
63450132130441
7412230002650
oct75572350071
923344440207
108286490681
113572565107
121733166a21
13a209c0c31
14588762197
1533773b771
hex1ede9d039

8286490681 has 8 divisors (see below), whose sum is σ = 9775768064. Its totient is φ = 6873586560.

The previous prime is 8286490661. The next prime is 8286490697. The reversal of 8286490681 is 1860946828.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-8286490681 is a prime.

It is a super-2 number, since 2×82864906812 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8286490661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19093080 + ... + 19093513.

It is an arithmetic number, because the mean of its divisors is an integer number (1221971008).

Almost surely, 28286490681 is an apocalyptic number.

It is an amenable number.

8286490681 is a deficient number, since it is larger than the sum of its proper divisors (1489277383).

8286490681 is a wasteful number, since it uses less digits than its factorization.

8286490681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38186631.

The product of its (nonzero) digits is 1327104, while the sum is 52.

The square root of 8286490681 is about 91030.1635777944. The cubic root of 8286490681 is about 2023.5947721533.

The spelling of 8286490681 in words is "eight billion, two hundred eighty-six million, four hundred ninety thousand, six hundred eighty-one".

Divisors: 1 7 31 217 38186593 267306151 1183784383 8286490681