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8195381 = 79227457
BaseRepresentation
bin11111010000110100110101
3120102100221122
4133100310311
54044223011
6451353325
7126442145
oct37206465
916370848
108195381
114698347
1228b2845
13190c34c
141134925
15abd3db
hex7d0d35

8195381 has 8 divisors (see below), whose sum is σ = 8353920. Its totient is φ = 8038368.

The previous prime is 8195351. The next prime is 8195393. The reversal of 8195381 is 1835918.

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

It is a cyclic number.

It is not a de Polignac number, because 8195381 - 214 = 8178997 is a prime.

It is a super-2 number, since 2×81953812 = 134328539470322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8195321) 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 7 ways as a sum of consecutive naturals, for example, 17705 + ... + 18161.

It is an arithmetic number, because the mean of its divisors is an integer number (1044240).

Almost surely, 28195381 is an apocalyptic number.

It is an amenable number.

8195381 is a deficient number, since it is larger than the sum of its proper divisors (158539).

8195381 is a wasteful number, since it uses less digits than its factorization.

8195381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763.

The product of its digits is 8640, while the sum is 35.

The square root of 8195381 is about 2862.7575866636. The cubic root of 8195381 is about 201.6150971965.

The spelling of 8195381 in words is "eight million, one hundred ninety-five thousand, three hundred eighty-one".

Divisors: 1 79 227 457 17933 36103 103739 8195381