3947406 has 16 divisors (see below), whose sum is σ = 7924224. Its totient is φ = 1310904.

The previous prime is 3947401. The next prime is 3947407. The reversal of 3947406 is 6047493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947401) by changing a digit.

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, 771 + ... + 2913.

It is an arithmetic number, because the mean of its divisors is an integer number (495264).

Almost surely, 2^3947406 is an apocalyptic number.

3947406 is an abundant number, since it is smaller than the sum of its proper divisors (3976818).

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

3947406 is a wasteful number, since it uses less digits than its factorization.

3947406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 3947406 is about 1986.8079927361. The cubic root of 3947406 is about 158.0413020263.

The spelling of 3947406 in words is "three million, nine hundred forty-seven thousand, four hundred six".