5681638 has 8 divisors (see below), whose sum is σ = 9023832. Its totient is φ = 2673696.

The previous prime is 5681629. The next prime is 5681647. The reversal of 5681638 is 8361865.

It is an interprime number because it is at equal distance from previous prime (5681629) and next prime (5681647).

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 = 5681597 and 5681606.

It is a congruent number.

It is an unprimeable number.

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, 83520 + ... + 83587.

It is an arithmetic number, because the mean of its divisors is an integer number (1127979).

Almost surely, 2^5681638 is an apocalyptic number.

5681638 is a deficient number, since it is larger than the sum of its proper divisors (3342194).

5681638 is a wasteful number, since it uses less digits than its factorization.

5681638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167126.

The product of its digits is 34560, while the sum is 37.

The square root of 5681638 is about 2383.6186775573. The cubic root of 5681638 is about 178.4395776107.

The spelling of 5681638 in words is "five million, six hundred eighty-one thousand, six hundred thirty-eight".