3921208 has 8 divisors (see below), whose sum is σ = 7352280. Its totient is φ = 1960600.

The previous prime is 3921193. The next prime is 3921209. The reversal of 3921208 is 8021293.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921209) 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 as a sum of consecutive naturals, namely, 245068 + ... + 245083.

It is an arithmetic number, because the mean of its divisors is an integer number (919035).

Almost surely, 2^3921208 is an apocalyptic number.

It is an amenable number.

3921208 is a deficient number, since it is larger than the sum of its proper divisors (3431072).

3921208 is a wasteful number, since it uses less digits than its factorization.

3921208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490157 (or 490153 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 3921208 is about 1980.2040298919. The cubic root of 3921208 is about 157.6908981158.

It can be divided in two parts, 392 and 1208, that added together give a square (1600 = 40²).

The spelling of 3921208 in words is "three million, nine hundred twenty-one thousand, two hundred eight".