3647638 has 8 divisors (see below), whose sum is σ = 5511240. Its totient is φ = 1810560.

The previous prime is 3647629. The next prime is 3647641. The reversal of 3647638 is 8367463.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 3647597 and 3647606.

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, 6283 + ... + 6838.

It is an arithmetic number, because the mean of its divisors is an integer number (688905).

Almost surely, 2^3647638 is an apocalyptic number.

3647638 is a deficient number, since it is larger than the sum of its proper divisors (1863602).

3647638 is a wasteful number, since it uses less digits than its factorization.

3647638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13262.

The product of its digits is 72576, while the sum is 37.

The square root of 3647638 is about 1909.8790537623. The cubic root of 3647638 is about 153.9349531330.

It can be divided in two parts, 36 and 47638, that added together give a palindrome (47674).

The spelling of 3647638 in words is "three million, six hundred forty-seven thousand, six hundred thirty-eight".