3978496 has 18 divisors (see below), whose sum is σ = 7941962. Its totient is φ = 1989120.

The previous prime is 3978479. The next prime is 3978497. The reversal of 3978496 is 6948793.

It can be written as a sum of positive squares in only one way, i.e., 3748096 + 230400 = 1936^2 + 480^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7515 + ... + 8026.

Almost surely, 2^3978496 is an apocalyptic number.

It is an amenable number.

3978496 is a deficient number, since it is larger than the sum of its proper divisors (3963466).

3978496 is an equidigital number, since it uses as much as digits as its factorization.

3978496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15557 (or 15543 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 3978496 is about 1994.6167551688. The cubic root of 3978496 is about 158.4551316440.

The spelling of 3978496 in words is "three million, nine hundred seventy-eight thousand, four hundred ninety-six".