3630681 has 12 divisors (see below), whose sum is σ = 5293860. Its totient is φ = 2397600.

The previous prime is 3630667. The next prime is 3630701. The reversal of 3630681 is 1860363.

It can be written as a sum of positive squares in 2 ways, for example, as 2005056 + 1625625 = 1416^2 + 1275^2 .

It is not a de Polignac number, because 3630681 - 2⁹ = 3630169 is a prime.

It is a super-3 number, since 3×3630681³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (3630611) 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 11 ways as a sum of consecutive naturals, for example, 870 + ... + 2831.

It is an arithmetic number, because the mean of its divisors is an integer number (441155).

Almost surely, 2^3630681 is an apocalyptic number.

It is an amenable number.

3630681 is a deficient number, since it is larger than the sum of its proper divisors (1663179).

3630681 is a wasteful number, since it uses less digits than its factorization.

3630681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3816 (or 3813 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 3630681 is about 1905.4345960961. The cubic root of 3630681 is about 153.6960469031.

The spelling of 3630681 in words is "three million, six hundred thirty thousand, six hundred eighty-one".