3400640 has 28 divisors (see below), whose sum is σ = 8098536. Its totient is φ = 1360128.

The previous prime is 3400637. The next prime is 3400673. The reversal of 3400640 is 460043.

3400640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 2.

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, 4994 + ... + 5633.

Almost surely, 2^3400640 is an apocalyptic number.

It is an amenable number.

3400640 is an abundant number, since it is smaller than the sum of its proper divisors (4697896).

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

3400640 is a wasteful number, since it uses less digits than its factorization.

3400640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10644 (or 10634 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 3400640 is about 1844.0824276588. The cubic root of 3400640 is about 150.3788939750.

Adding to 3400640 its reverse (460043), we get a palindrome (3860683).

The spelling of 3400640 in words is "three million, four hundred thousand, six hundred forty".