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2805029 = 10972557
BaseRepresentation
bin1010101100110100100101
312021111202222
422230310211
51204230104
6140042125
732561633
oct12546445
95244688
102805029
111646507
12b33345
137729a6
14530353
153a61be
hex2acd25

2805029 has 4 divisors (see below), whose sum is σ = 2808684. Its totient is φ = 2801376.

The previous prime is 2805001. The next prime is 2805031. The reversal of 2805029 is 9205082.

2805029 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 996004 + 1809025 = 998^2 + 1345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-2805029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2804989 and 2805007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182 + ... + 2375.

It is an arithmetic number, because the mean of its divisors is an integer number (702171).

22805029 is an apocalyptic number.

It is an amenable number.

2805029 is a deficient number, since it is larger than the sum of its proper divisors (3655).

2805029 is a wasteful number, since it uses less digits than its factorization.

2805029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3654.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 2805029 is about 1674.8220801028. The cubic root of 2805029 is about 141.0303071850.

It can be divided in two parts, 28050 and 29, that multiplied together give a triangular number (813450 = T1275).

The spelling of 2805029 in words is "two million, eight hundred five thousand, twenty-nine".

Divisors: 1 1097 2557 2805029