3645783 has 8 divisors (see below), whose sum is σ = 5401200. Its totient is φ = 2430504.

The previous prime is 3645781. The next prime is 3645791. The reversal of 3645783 is 3875463.

It is a happy number.

3645783 is a `hidden beast` number, since 3 + 645 + 7 + 8 + 3 = 666.

It is not a de Polignac number, because 3645783 - 2¹ = 3645781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645781) 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, 67488 + ... + 67541.

It is an arithmetic number, because the mean of its divisors is an integer number (675150).

Almost surely, 2^3645783 is an apocalyptic number.

3645783 is a deficient number, since it is larger than the sum of its proper divisors (1755417).

3645783 is a wasteful number, since it uses less digits than its factorization.

3645783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135038 (or 135032 counting only the distinct ones).

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

The square root of 3645783 is about 1909.3933591589. The cubic root of 3645783 is about 153.9088542569.

It can be divided in two parts, 364 and 5783, that multiplied together give a palindrome (2105012).

The spelling of 3645783 in words is "three million, six hundred forty-five thousand, seven hundred eighty-three".