3921008 has 40 divisors (see below), whose sum is σ = 9353568. Its totient is φ = 1550592.

The previous prime is 3920989. The next prime is 3921023. The reversal of 3921008 is 8001293.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110 + ... + 2802.

Almost surely, 2^3921008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3921008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4676784).

3921008 is an abundant number, since it is smaller than the sum of its proper divisors (5432560).

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

3921008 is a wasteful number, since it uses less digits than its factorization.

3921008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721 (or 2715 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 3921008 is about 1980.1535294012. The cubic root of 3921008 is about 157.6882170784.

The spelling of 3921008 in words is "three million, nine hundred twenty-one thousand, eight".