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2000745 = 325173257
BaseRepresentation
bin111101000011101101001
310202122111200
413220131221
51003010440
6110514413
723002035
oct7503551
93678450
102000745
11114720a
12805a09
13550896
143a11c5
15297c30
hex1e8769

2000745 has 24 divisors (see below), whose sum is σ = 3501576. Its totient is φ = 1056768.

The previous prime is 2000731. The next prime is 2000753. The reversal of 2000745 is 5470002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1212201 + 788544 = 1101^2 + 888^2 .

It is not a de Polignac number, because 2000745 - 210 = 1999721 is a prime.

2000745 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7657 + ... + 7913.

It is an arithmetic number, because the mean of its divisors is an integer number (145899).

22000745 is an apocalyptic number.

It is an amenable number.

2000745 is a deficient number, since it is larger than the sum of its proper divisors (1500831).

2000745 is a wasteful number, since it uses less digits than its factorization.

2000745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 2000745 is about 1414.4769351248. The cubic root of 2000745 is about 126.0077470671.

Adding to 2000745 its reverse (5470002), we get a palindrome (7470747).

The spelling of 2000745 in words is "two million, seven hundred forty-five", and thus it is an aban number.

Divisors: 1 3 5 9 15 45 173 257 519 771 865 1285 1557 2313 2595 3855 7785 11565 44461 133383 222305 400149 666915 2000745