3631616 has 40 divisors (see below), whose sum is σ = 7476084. Its totient is φ = 1761280.

The previous prime is 3631609. The next prime is 3631633. The reversal of 3631616 is 6161363.

It can be written as a sum of positive squares in 2 ways, for example, as 3625216 + 6400 = 1904^2 + 80^2 .

Its product of digits (1944) is a multiple of the sum of its prime divisors (216).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20906 + ... + 21078.

Almost surely, 2^3631616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3631616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3738042).

3631616 is an abundant number, since it is smaller than the sum of its proper divisors (3844468).

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

3631616 is an equidigital number, since it uses as much as digits as its factorization.

3631616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 216 counting only the distinct ones).

The product of its digits is 1944, while the sum is 26.

The square root of 3631616 is about 1905.6799311532. The cubic root of 3631616 is about 153.7092394208.

Adding to 3631616 its reverse (6161363), we get a palindrome (9792979).

The spelling of 3631616 in words is "three million, six hundred thirty-one thousand, six hundred sixteen".