It is a happy number.
It is a plaindrome in base 12 and base 15.
It is a nialpdrome in base 7 and base 13.
It is a zygodrome in base 7 and base 12.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 1976.
1976 is the 26-th octagonal number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2100).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1976 is a wasteful number, since it uses less digits than its factorization.
1976 is an odious number, because the sum of its binary digits is odd.
The square root of 1976 is about 44.4522215418. The cubic root of 1976 is about 12.5486107148.
Subtracting from 1976 its sum of digits (23), we obtain a triangular number (1953 = T62).
The spelling of 1976 in words is "one thousand, nine hundred seventy-six".