It is an Ulam number.
It is a congruent number.
It is an unprimeable number.
Almost surely, 23978606 is an apocalyptic number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
3978606 is a wasteful number, since it uses less digits than its factorization.
3978606 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 11303.
The square root of 3978606 is about 1994.6443291976. The cubic root of 3978606 is about 158.4565919868.
The spelling of 3978606 in words is "three million, nine hundred seventy-eight thousand, six hundred six".