3947420 has 12 divisors (see below), whose sum is σ = 8289624. Its totient is φ = 1578960.

The previous prime is 3947413. The next prime is 3947431. The reversal of 3947420 is 247493.

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 3 ways as a sum of consecutive naturals, for example, 98666 + ... + 98705.

It is an arithmetic number, because the mean of its divisors is an integer number (690802).

Almost surely, 2^3947420 is an apocalyptic number.

It is an amenable number.

3947420 is an abundant number, since it is smaller than the sum of its proper divisors (4342204).

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

3947420 is a wasteful number, since it uses less digits than its factorization.

3947420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197380 (or 197378 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 3947420 is about 1986.8115159723. The cubic root of 3947420 is about 158.0414888642.

The spelling of 3947420 in words is "three million, nine hundred forty-seven thousand, four hundred twenty".