5649638 has 4 divisors (see below), whose sum is σ = 8474460. Its totient is φ = 2824818.

The previous prime is 5649619. The next prime is 5649647. The reversal of 5649638 is 8369465.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 5649595 and 5649604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1412408 + ... + 1412411.

It is an arithmetic number, because the mean of its divisors is an integer number (2118615).

Almost surely, 2^5649638 is an apocalyptic number.

5649638 is a deficient number, since it is larger than the sum of its proper divisors (2824822).

5649638 is a wasteful number, since it uses less digits than its factorization.

5649638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2824821.

The product of its digits is 155520, while the sum is 41.

The square root of 5649638 is about 2376.8967163089. The cubic root of 5649638 is about 178.1039455160.

It can be divided in two parts, 56 and 49638, that added together give a palindrome (49694).

The spelling of 5649638 in words is "five million, six hundred forty-nine thousand, six hundred thirty-eight".