3638305 has 16 divisors (see below), whose sum is σ = 4826304. Its totient is φ = 2610880.

The previous prime is 3638303. The next prime is 3638333. The reversal of 3638305 is 5038363.

It is not a de Polignac number, because 3638305 - 2¹ = 3638303 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3638303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4167 + ... + 4963.

It is an arithmetic number, because the mean of its divisors is an integer number (301644).

Almost surely, 2^3638305 is an apocalyptic number.

It is an amenable number.

3638305 is a deficient number, since it is larger than the sum of its proper divisors (1187999).

3638305 is a wasteful number, since it uses less digits than its factorization.

3638305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 3638305 is about 1907.4341404096. The cubic root of 3638305 is about 153.8035528520.

It can be divided in two parts, 363 and 8305, that added together give a palindrome (8668).

The spelling of 3638305 in words is "three million, six hundred thirty-eight thousand, three hundred five".