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2812 = 221937
BaseRepresentation
bin101011111100
310212011
4223330
542222
621004
711125
oct5374
93764
102812
112127
121764
131384
14104c
15c77
hexafc

2812 has 12 divisors (see below), whose sum is σ = 5320. Its totient is φ = 1296.

The previous prime is 2803. The next prime is 2819. The reversal of 2812 is 2182.

Adding to 2812 its reverse (2182), we get a palindrome (4994).

Subtracting from 2812 its reverse (2182), we obtain a triangular number (630 = T35).

It is a plaindrome in base 7.

It is a nialpdrome in base 5 and base 15.

It is a junction number, because it is equal to n+sod(n) for n = 2792 and 2801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58 + ... + 94.

22812 is an apocalyptic number.

It is an amenable number.

2812 is a deficient number, since it is larger than the sum of its proper divisors (2508).

2812 is a wasteful number, since it uses less digits than its factorization.

2812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60 (or 58 counting only the distinct ones).

The product of its digits is 32, while the sum is 13.

The square root of 2812 is about 53.0282943343. The cubic root of 2812 is about 14.1147039072.

The spelling of 2812 in words is "two thousand, eight hundred twelve".

Divisors: 1 2 4 19 37 38 74 76 148 703 1406 2812