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86880381 = 372591023
BaseRepresentation
bin1010010110110…
…11000001111101
320001110222110220
411023123001331
5134220133011
612342051553
72103320400
oct513330175
9201428426
1086880381
1145050575
1225119bb9
1314ccc013
14b777d37
157962506
hex52db07d

86880381 has 12 divisors (see below), whose sum is σ = 134753472. Its totient is φ = 49645848.

The previous prime is 86880377. The next prime is 86880401. The reversal of 86880381 is 18308868.

It is a happy number.

It is not a de Polignac number, because 86880381 - 22 = 86880377 is a prime.

It is a super-2 number, since 2×868803812 = 15096401205410322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86880371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 295365 + ... + 295658.

It is an arithmetic number, because the mean of its divisors is an integer number (11229456).

Almost surely, 286880381 is an apocalyptic number.

It is an amenable number.

86880381 is a deficient number, since it is larger than the sum of its proper divisors (47873091).

86880381 is a wasteful number, since it uses less digits than its factorization.

86880381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591040 (or 591033 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 86880381 is about 9320.9645960061. The cubic root of 86880381 is about 442.9015895284.

The spelling of 86880381 in words is "eighty-six million, eight hundred eighty thousand, three hundred eighty-one".

Divisors: 1 3 7 21 49 147 591023 1773069 4137161 12411483 28960127 86880381