3645740 has 24 divisors (see below), whose sum is σ = 8750112. Its totient is φ = 1249920.

The previous prime is 3645737. The next prime is 3645749. The reversal of 3645740 is 475463.

3645740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3645749) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12881 + ... + 13160.

It is an arithmetic number, because the mean of its divisors is an integer number (364588).

Almost surely, 2^3645740 is an apocalyptic number.

It is an amenable number.

3645740 is an abundant number, since it is smaller than the sum of its proper divisors (5104372).

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

3645740 is a wasteful number, since it uses less digits than its factorization.

3645740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26057 (or 26055 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 3645740 is about 1909.3820990048. The cubic root of 3645740 is about 153.9082491645.

The spelling of 3645740 in words is "three million, six hundred forty-five thousand, seven hundred forty".