3978608 has 20 divisors (see below), whose sum is σ = 7759920.
Its totient is φ = 1976064.
The previous prime is 3978593. The next prime is 3978641. The reversal of 3978608 is 8068793.
It is an Ulam number.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1928 + ... + 3416.
It is an arithmetic number, because the mean of its divisors is an integer number (387996).
Almost surely, 23978608 is an apocalyptic number.
It is an amenable number.
3978608 is a deficient number, since it is larger than the sum of its proper divisors (3781312).
3978608 is a wasteful number, since it uses less digits than its factorization.
3978608 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1664 (or 1658 counting only the distinct ones).
The product of its (nonzero) digits is 72576, while the sum is 41.
The square root of 3978608 is about 1994.6448305400.
The cubic root of 3978608 is about 158.4566185382.
The spelling of 3978608 in words is "three million, nine hundred seventy-eight thousand, six hundred eight".