3978368 has 16 divisors (see below), whose sum is σ = 7925910. Its totient is φ = 1989120.

The previous prime is 3978349. The next prime is 3978421. The reversal of 3978368 is 8638793.

It can be written as a sum of positive squares in only one way, i.e., 3655744 + 322624 = 1912^2 + 568^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15413 + ... + 15668.

Almost surely, 2^3978368 is an apocalyptic number.

It is an amenable number.

3978368 is a deficient number, since it is larger than the sum of its proper divisors (3947542).

3978368 is an equidigital number, since it uses as much as digits as its factorization.

3978368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31095 (or 31083 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 3978368 is about 1994.5846685463. The cubic root of 3978368 is about 158.4534323021.

The spelling of 3978368 in words is "three million, nine hundred seventy-eight thousand, three hundred sixty-eight".