3978984 has 32 divisors (see below), whose sum is σ = 9997920. Its totient is φ = 1319616.

The previous prime is 3978979. The next prime is 3979013. The reversal of 3978984 is 4898793.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7347 + ... + 7869.

It is an arithmetic number, because the mean of its divisors is an integer number (312435).

Almost surely, 2^3978984 is an apocalyptic number.

It is an amenable number.

3978984 is an abundant number, since it is smaller than the sum of its proper divisors (6018936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3978984 is a wasteful number, since it uses less digits than its factorization.

3978984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849 (or 845 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 3978984 is about 1994.7390806820. The cubic root of 3978984 is about 158.4616100505.

The spelling of 3978984 in words is "three million, nine hundred seventy-eight thousand, nine hundred eighty-four".