3920904 has 96 divisors (see below), whose sum is σ = 11793600. Its totient is φ = 1169280.

The previous prime is 3920899. The next prime is 3920909. The reversal of 3920904 is 4090293.

It is an interprime number because it is at equal distance from previous prime (3920899) and next prime (3920909).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3920909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55189 + ... + 55259.

It is an arithmetic number, because the mean of its divisors is an integer number (122850).

Almost surely, 2^3920904 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 3920904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5896800).

3920904 is an abundant number, since it is smaller than the sum of its proper divisors (7872696).

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

3920904 is a wasteful number, since it uses less digits than its factorization.

3920904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 3920904 is about 1980.1272686370. The cubic root of 3920904 is about 157.6868229029.

The spelling of 3920904 in words is "three million, nine hundred twenty thousand, nine hundred four".