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2804 = 22701
BaseRepresentation
bin101011110100
310211212
4223310
542204
620552
711114
oct5364
93755
102804
11211a
121758
131379
141044
15c6e
hexaf4

2804 has 6 divisors (see below), whose sum is σ = 4914. Its totient is φ = 1400.

The previous prime is 2803. The next prime is 2819. The reversal of 2804 is 4082.

Adding to 2804 its reverse (4082), we get a palindrome (6886).

It can be written as a sum of positive squares in only one way, i.e., 2704 + 100 = 52^2 + 10^2 .

It is a plaindrome in base 7 and base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347 + ... + 354.

It is an arithmetic number, because the mean of its divisors is an integer number (819).

22804 is an apocalyptic number.

It is an amenable number.

2804 is a deficient number, since it is larger than the sum of its proper divisors (2110).

2804 is a wasteful number, since it uses less digits than its factorization.

2804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705 (or 703 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2804 is about 52.9528091795. The cubic root of 2804 is about 14.1013059837.

The spelling of 2804 in words is "two thousand, eight hundred four".

Divisors: 1 2 4 701 1402 2804