1870 is nontrivially palindromic in base 13.
It is an alternating number because its digits alternate between odd and even.
1870 is an undulating number in base 13.
It is a nialpdrome in base 7.
It is a congruent number.
21870 is an apocalyptic number.
1870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
1870 is the 22-nd decagonal number.
1870 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1870 is a wasteful number, since it uses less digits than its factorization.
1870 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 35.
The square root of 1870 is about 43.2434966209. The cubic root of 1870 is about 12.3200896716.
Subtracting from 1870 its reverse (781), we obtain a square (1089 = 332).
The spelling of 1870 in words is "one thousand, eight hundred seventy".