3633861 has 16 divisors (see below), whose sum is σ = 6041088. Its totient is φ = 1887600.

The previous prime is 3633859. The next prime is 3633863. The reversal of 3633861 is 1683363.

It is an interprime number because it is at equal distance from previous prime (3633859) and next prime (3633863).

It is not a de Polignac number, because 3633861 - 2¹ = 3633859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3633863) 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 15 ways as a sum of consecutive naturals, for example, 7635 + ... + 8096.

It is an arithmetic number, because the mean of its divisors is an integer number (377568).

Almost surely, 2^3633861 is an apocalyptic number.

It is an amenable number.

3633861 is a deficient number, since it is larger than the sum of its proper divisors (2407227).

3633861 is a wasteful number, since it uses less digits than its factorization.

3633861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15752.

The product of its digits is 7776, while the sum is 30.

The square root of 3633861 is about 1906.2688687591. The cubic root of 3633861 is about 153.7409063298.

It can be divided in two parts, 363 and 3861, that added together give a palindrome (4224).

The spelling of 3633861 in words is "three million, six hundred thirty-three thousand, eight hundred sixty-one".