3397840 has 20 divisors (see below), whose sum is σ = 7900164. Its totient is φ = 1359104.

The previous prime is 3397837. The next prime is 3397853. The reversal of 3397840 is 487933.

3397840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 876096 + 2521744 = 936^2 + 1588^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 3397796 and 3397805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21157 + ... + 21316.

Almost surely, 2^3397840 is an apocalyptic number.

It is an amenable number.

3397840 is an abundant number, since it is smaller than the sum of its proper divisors (4502324).

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

3397840 is a wasteful number, since it uses less digits than its factorization.

3397840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42486 (or 42480 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 3397840 is about 1843.3230861680. The cubic root of 3397840 is about 150.3376099305.

The spelling of 3397840 in words is "three million, three hundred ninety-seven thousand, eight hundred forty".