3978375 has 24 divisors (see below), whose sum is σ = 6684912. Its totient is φ = 2101200.

The previous prime is 3978349. The next prime is 3978421. The reversal of 3978375 is 5738793.

It is not a de Polignac number, because 3978375 - 2⁹ = 3977863 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38574 + ... + 38676.

It is an arithmetic number, because the mean of its divisors is an integer number (278538).

Almost surely, 2^3978375 is an apocalyptic number.

3978375 is a deficient number, since it is larger than the sum of its proper divisors (2706537).

3978375 is an equidigital number, since it uses as much as digits as its factorization.

3978375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 111 counting only the distinct ones).

The product of its digits is 158760, while the sum is 42.

The square root of 3978375 is about 1994.5864232968. The cubic root of 3978375 is about 158.4535252358.

The spelling of 3978375 in words is "three million, nine hundred seventy-eight thousand, three hundred seventy-five".