3631885 has 4 divisors (see below), whose sum is σ = 4358268. Its totient is φ = 2905504.

The previous prime is 3631877. The next prime is 3631889. The reversal of 3631885 is 5881363.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5881363 = 557 ⋅10559.

It can be written as a sum of positive squares in 2 ways, for example, as 413449 + 3218436 = 643^2 + 1794^2 .

It is a cyclic number.

It is not a de Polignac number, because 3631885 - 2³ = 3631877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3631885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3631889) 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 3 ways as a sum of consecutive naturals, for example, 363184 + ... + 363193.

It is an arithmetic number, because the mean of its divisors is an integer number (1089567).

Almost surely, 2^3631885 is an apocalyptic number.

It is an amenable number.

3631885 is a deficient number, since it is larger than the sum of its proper divisors (726383).

3631885 is an equidigital number, since it uses as much as digits as its factorization.

3631885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726382.

The product of its digits is 17280, while the sum is 34.

The square root of 3631885 is about 1905.7505083300. The cubic root of 3631885 is about 153.7130344957.

The spelling of 3631885 in words is "three million, six hundred thirty-one thousand, eight hundred eighty-five".