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1856 = 2629
BaseRepresentation
bin11101000000
32112202
4131000
524411
612332
75261
oct3500
92482
101856
111438
1210a8
13aca
14968
1583b
hex740

1856 has 14 divisors (see below), whose sum is σ = 3810. Its totient is φ = 896.

The previous prime is 1847. The next prime is 1861. The reversal of 1856 is 6581.

It can be divided in two parts, 185 and 6, that added together give a palindrome (191).

1856 is nontrivially palindromic in base 13.

It can be written as a sum of positive squares in only one way, i.e., 1600 + 256 = 40^2 + 16^2 .

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

1856 is an undulating number in base 13.

It is a nialpdrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50 + ... + 78.

1856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1905).

1856 is an abundant number, since it is smaller than the sum of its proper divisors (1954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1856 is an equidigital number, since it uses as much as digits as its factorization.

1856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41 (or 31 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 1856 is about 43.0813184571. The cubic root of 1856 is about 12.2892673027.

The spelling of 1856 in words is "one thousand, eight hundred fifty-six".

Divisors: 1 2 4 8 16 29 32 58 64 116 232 464 928 1856