3905240 has 32 divisors (see below), whose sum is σ = 9305280. Its totient is φ = 1469952.

The previous prime is 3905221. The next prime is 3905263. The reversal of 3905240 is 425093.

It is a congruent number.

It is an unprimeable number.

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, 2192 + ... + 3551.

It is an arithmetic number, because the mean of its divisors is an integer number (290790).

Almost surely, 2^3905240 is an apocalyptic number.

It is an amenable number.

3905240 is an abundant number, since it is smaller than the sum of its proper divisors (5400040).

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

3905240 is a wasteful number, since it uses less digits than its factorization.

3905240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5771 (or 5767 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 3905240 is about 1976.1680090519. The cubic root of 3905240 is about 157.4765565174.

The spelling of 3905240 in words is "three million, nine hundred five thousand, two hundred forty".