3978396 has 36 divisors (see below), whose sum is σ = 10431512. Its totient is φ = 1325808.

The previous prime is 3978349. The next prime is 3978421. The reversal of 3978396 is 6938793.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nialpdrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1075 + ... + 3018.

Almost surely, 2^3978396 is an apocalyptic number.

3978396 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3978396 is an abundant number, since it is smaller than the sum of its proper divisors (6453116).

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

3978396 is a wasteful number, since it uses less digits than its factorization.

3978396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4112 (or 4098 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 3978396 is about 1994.5916875391. The cubic root of 3978396 is about 158.4538040363.

The spelling of 3978396 in words is "three million, nine hundred seventy-eight thousand, three hundred ninety-six".