3978403 has 16 divisors (see below), whose sum is σ = 4790016. Its totient is φ = 3255840.

The previous prime is 3978349. The next prime is 3978421. The reversal of 3978403 is 3048793.

It is a cyclic number.

It is not a de Polignac number, because 3978403 - 2⁹ = 3977891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3978433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5826 + ... + 6472.

It is an arithmetic number, because the mean of its divisors is an integer number (299376).

Almost surely, 2^3978403 is an apocalyptic number.

3978403 is a deficient number, since it is larger than the sum of its proper divisors (811613).

3978403 is a wasteful number, since it uses less digits than its factorization.

3978403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 3978403 is about 1994.5934422834. The cubic root of 3978403 is about 158.4538969695.

The spelling of 3978403 in words is "three million, nine hundred seventy-eight thousand, four hundred three".