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1304 = 23163
BaseRepresentation
bin10100011000
31210022
4110120
520204
610012
73542
oct2430
91708
101304
11a86
12908
13794
14692
155be
hex518

1304 has 8 divisors (see below), whose sum is σ = 2460. Its totient is φ = 648.

The previous prime is 1303. The next prime is 1307. The reversal of 1304 is 4031.

Adding to 1304 its reverse (4031), we get a palindrome (5335).

It is a tau number, because it is divible by the number of its divisors (8).

It is a Harshad number since it is a multiple of its sum of digits (8), and also a Moran number because the ratio is a prime number: 163 = 1304 / (1 + 3 + 0 + 4).

It is a plaindrome in base 15.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 1291 and 1300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74 + ... + 89.

21304 is an apocalyptic number.

It is an amenable number.

1304 is a deficient number, since it is larger than the sum of its proper divisors (1156).

1304 is a wasteful number, since it uses less digits than its factorization.

1304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 1304 is about 36.1109401705. The cubic root of 1304 is about 10.9251111426.

The spelling of 1304 in words is "one thousand, three hundred four", and thus it is an iban number.

Divisors: 1 2 4 8 163 326 652 1304