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8378371 = 23894093
BaseRepresentation
bin11111111101100000000011
3120202122222001
4133331200003
54121101441
6455324431
7131133511
oct37754003
916678861
108378371
114802881
122980717
131974721
1411814b1
15b07731
hex7fd803

8378371 has 8 divisors (see below), whose sum is σ = 8843040. Its totient is φ = 7922112.

The previous prime is 8378369. The next prime is 8378387. The reversal of 8378371 is 1738738.

8378371 is a nontrivial binomial coefficient, being equal to C(4094, 2).

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

It is a 6-Lehmer number, since φ(8378371) divides (8378371-1)6.

It is a cyclic number.

It is not a de Polignac number, because 8378371 - 21 = 8378369 is a prime.

It is a super-2 number, since 2×83783712 = 140394201227282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8378371.

It is not an unprimeable number, because it can be changed into a prime (8378311) 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, 1 + ... + 4093.

It is an arithmetic number, because the mean of its divisors is an integer number (1105380).

Almost surely, 28378371 is an apocalyptic number.

8378371 is the 4093-rd triangular number and also the 2047-th hexagonal number.

8378371 is the 1365-th centered nonagonal number.

8378371 is a deficient number, since it is larger than the sum of its proper divisors (464669).

8378371 is a wasteful number, since it uses less digits than its factorization.

8378371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4205.

The product of its digits is 28224, while the sum is 37.

The square root of 8378371 is about 2894.5415871948. The cubic root of 8378371 is about 203.1046480911.

The spelling of 8378371 in words is "eight million, three hundred seventy-eight thousand, three hundred seventy-one".

Divisors: 1 23 89 2047 4093 94139 364277 8378371