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7852385 = 51792381
BaseRepresentation
bin11101111101000101100001
3112202221110002
4131331011201
54002234020
6440145345
7123513152
oct35750541
915687402
107852385
114483682
122768255
13181c1a8
141085929
15a51975
hex77d161

7852385 has 8 divisors (see below), whose sum is σ = 9977256. Its totient is φ = 5912320.

The previous prime is 7852373. The next prime is 7852421. The reversal of 7852385 is 5832587.

It can be written as a sum of positive squares in 4 ways, for example, as 2202256 + 5650129 = 1484^2 + 2377^2 .

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

It is not a de Polignac number, because 7852385 - 28 = 7852129 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 46106 + ... + 46275.

It is an arithmetic number, because the mean of its divisors is an integer number (1247157).

Almost surely, 27852385 is an apocalyptic number.

It is an amenable number.

7852385 is a deficient number, since it is larger than the sum of its proper divisors (2124871).

7852385 is a wasteful number, since it uses less digits than its factorization.

7852385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92403.

The product of its digits is 67200, while the sum is 38.

The square root of 7852385 is about 2802.2107344024. The cubic root of 7852385 is about 198.7622304355.

It can be divided in two parts, 7 and 852385, that multiplied together give a palindrome (5966695).

The spelling of 7852385 in words is "seven million, eight hundred fifty-two thousand, three hundred eighty-five".

Divisors: 1 5 17 85 92381 461905 1570477 7852385