3639918 has 8 divisors (see below), whose sum is σ = 7279848. Its totient is φ = 1213304.

The previous prime is 3639913. The next prime is 3639919. The reversal of 3639918 is 8199363.

It is a sphenic number, since it is the product of 3 distinct primes.

3639918 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3639913) 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, 303321 + ... + 303332.

It is an arithmetic number, because the mean of its divisors is an integer number (909981).

Almost surely, 2^3639918 is an apocalyptic number.

3639918 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3639918 is a wasteful number, since it uses less digits than its factorization.

3639918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606658.

The product of its digits is 34992, while the sum is 39.

The square root of 3639918 is about 1907.8569128737. The cubic root of 3639918 is about 153.8262784965.

The spelling of 3639918 in words is "three million, six hundred thirty-nine thousand, nine hundred eighteen".