3978460 has 24 divisors (see below), whose sum is σ = 8482320. Its totient is φ = 1567104.

The previous prime is 3978451. The next prime is 3978473. The reversal of 3978460 is 648793.

3978460 = T₁₂₅₉ + T₁₂₆₀ + ... + T₁₂₆₃.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145 + ... + 2824.

It is an arithmetic number, because the mean of its divisors is an integer number (353430).

Almost surely, 2^3978460 is an apocalyptic number.

It is an amenable number.

3978460 is an abundant number, since it is smaller than the sum of its proper divisors (4503860).

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

3978460 is a wasteful number, since it uses less digits than its factorization.

3978460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3045 (or 3043 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 3978460 is about 1994.6077308584. The cubic root of 3978460 is about 158.4546537078.

The spelling of 3978460 in words is "three million, nine hundred seventy-eight thousand, four hundred sixty".