3645738 has 24 divisors (see below), whose sum is σ = 8019648. Its totient is φ = 1196712.

The previous prime is 3645737. The next prime is 3645749. The reversal of 3645738 is 8375463.

It is a happy number.

3645738 is a `hidden beast` number, since 3 + 645 + 7 + 3 + 8 = 666.

3645738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 3⁴ + 6⁶ + 4⁷ + 5⁹ + 7⁴ + 3¹³ + 8⁵ .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3645731) 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 11 ways as a sum of consecutive naturals, for example, 306 + ... + 2717.

It is an arithmetic number, because the mean of its divisors is an integer number (334152).

Almost surely, 2^3645738 is an apocalyptic number.

3645738 is an abundant number, since it is smaller than the sum of its proper divisors (4373910).

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

3645738 is a wasteful number, since it uses less digits than its factorization.

3645738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3098 (or 3095 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 3645738 is about 1909.3815752751. The cubic root of 3645738 is about 153.9082210206.

The spelling of 3645738 in words is "three million, six hundred forty-five thousand, seven hundred thirty-eight".