3904240 has 40 divisors (see below), whose sum is σ = 9329760. Its totient is φ = 1518336.

The previous prime is 3904217. The next prime is 3904249. The reversal of 3904240 is 424093.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3904249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2301 + ... + 3619.

It is an arithmetic number, because the mean of its divisors is an integer number (233244).

Almost surely, 2^3904240 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 3904240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4664880).

3904240 is an abundant number, since it is smaller than the sum of its proper divisors (5425520).

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

3904240 is a wasteful number, since it uses less digits than its factorization.

3904240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369 (or 1363 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 3904240 is about 1975.9149779279. The cubic root of 3904240 is about 157.4631138950.

The spelling of 3904240 in words is "three million, nine hundred four thousand, two hundred forty".