3908440 has 16 divisors (see below), whose sum is σ = 8794080. Its totient is φ = 1563360.

The previous prime is 3908423. The next prime is 3908441. The reversal of 3908440 is 448093.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3908399 and 3908408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3908441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48816 + ... + 48895.

It is an arithmetic number, because the mean of its divisors is an integer number (549630).

Almost surely, 2^3908440 is an apocalyptic number.

It is an amenable number.

3908440 is an abundant number, since it is smaller than the sum of its proper divisors (4885640).

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

3908440 is a wasteful number, since it uses less digits than its factorization.

3908440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97722 (or 97718 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 3908440 is about 1976.9774910201. The cubic root of 3908440 is about 157.5195574941.

The spelling of 3908440 in words is "three million, nine hundred eight thousand, four hundred forty".