It is a congruent number.
It is an unprimeable number.
Almost surely, 278453478 is an apocalyptic number.
78453478 is a wasteful number, since it uses less digits than its factorization.
78453478 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1491.
The square root of 78453478 is about 8857.3967958989. The cubic root of 78453478 is about 428.0922843774.
Subtracting 78453478 from its reverse (87435487), we obtain a square (8982009 = 29972).
The spelling of 78453478 in words is "seventy-eight million, four hundred fifty-three thousand, four hundred seventy-eight".