5681906 has 8 divisors (see below), whose sum is σ = 8662764. Its totient is φ = 2794320.

The previous prime is 5681899. The next prime is 5681911. The reversal of 5681906 is 6091865.

It can be written as a sum of positive squares in 2 ways, for example, as 3553225 + 2128681 = 1885^2 + 1459^2 .

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

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, 23165 + ... + 23408.

Almost surely, 2^5681906 is an apocalyptic number.

5681906 is a deficient number, since it is larger than the sum of its proper divisors (2980858).

5681906 is a wasteful number, since it uses less digits than its factorization.

5681906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46636.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 5681906 is about 2383.6748939400. The cubic root of 5681906 is about 178.4423832016.

The spelling of 5681906 in words is "five million, six hundred eighty-one thousand, nine hundred six".