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80380986 = 2371913833
BaseRepresentation
bin1001100101010…
…00010000111010
312121020202222120
410302220100322
5131034142421
611550502110
71664140620
oct462502072
9177222876
1080380986
1141411474
1222b04936
131386491a
14a965510
1570cb8c6
hex4ca843a

80380986 has 16 divisors (see below), whose sum is σ = 183728064. Its totient is φ = 22965984.

The previous prime is 80380969. The next prime is 80380997. The reversal of 80380986 is 68908308.

It is a super-2 number, since 2×803809862 = 12922205820664392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1913833 = 80380986 / (8 + 0 + 3 + 8 + 0 + 9 + 8 + 6).

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 956875 + ... + 956958.

It is an arithmetic number, because the mean of its divisors is an integer number (11483004).

Almost surely, 280380986 is an apocalyptic number.

80380986 is an abundant number, since it is smaller than the sum of its proper divisors (103347078).

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

80380986 is a wasteful number, since it uses less digits than its factorization.

80380986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913845.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 80380986 is about 8965.5443783409. The cubic root of 80380986 is about 431.5698629265.

The spelling of 80380986 in words is "eighty million, three hundred eighty thousand, nine hundred eighty-six".

Divisors: 1 2 3 6 7 14 21 42 1913833 3827666 5741499 11482998 13396831 26793662 40190493 80380986