3405640 has 32 divisors (see below), whose sum is σ = 8758080. Its totient is φ = 1167552.

The previous prime is 3405637. The next prime is 3405641. The reversal of 3405640 is 465043.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3405641) by changing a digit.

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, 5802 + ... + 6361.

It is an arithmetic number, because the mean of its divisors is an integer number (273690).

Almost surely, 2^3405640 is an apocalyptic number.

It is an amenable number.

3405640 is an abundant number, since it is smaller than the sum of its proper divisors (5352440).

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

3405640 is a wasteful number, since it uses less digits than its factorization.

3405640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12181 (or 12177 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 3405640 is about 1845.4376174772. The cubic root of 3405640 is about 150.4525591542.

The spelling of 3405640 in words is "three million, four hundred five thousand, six hundred forty".