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6868845 = 325152641
BaseRepresentation
bin11010001100111101101101
3110220222021200
4122030331231
53224300340
6403120113
7112245534
oct32147555
913828250
106868845
113971735
122373039
131566609
14cab31b
1590a330
hex68cf6d

6868845 has 12 divisors (see below), whose sum is σ = 11906076. Its totient is φ = 3663360.

The previous prime is 6868843. The next prime is 6868859. The reversal of 6868845 is 5488686.

It can be written as a sum of positive squares in 2 ways, for example, as 1022121 + 5846724 = 1011^2 + 2418^2 .

It is not a de Polignac number, because 6868845 - 21 = 6868843 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 152641 = 6868845 / (6 + 8 + 6 + 8 + 8 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 6868845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6868843) 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, 76276 + ... + 76365.

It is an arithmetic number, because the mean of its divisors is an integer number (992173).

Almost surely, 26868845 is an apocalyptic number.

It is an amenable number.

6868845 is a deficient number, since it is larger than the sum of its proper divisors (5037231).

6868845 is a wasteful number, since it uses less digits than its factorization.

6868845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152652 (or 152649 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 6868845 is about 2620.8481451622. The cubic root of 6868845 is about 190.0908614353.

The spelling of 6868845 in words is "six million, eight hundred sixty-eight thousand, eight hundred forty-five".

Divisors: 1 3 5 9 15 45 152641 457923 763205 1373769 2289615 6868845