5681646 has 48 divisors (see below), whose sum is σ = 13338000. Its totient is φ = 1741824.

The previous prime is 5681629. The next prime is 5681647. The reversal of 5681646 is 6461865.

5681646 is a `hidden beast` number, since 5 + 6 + 8 + 1 + 646 = 666.

It is a super-2 number, since 2×5681646² = 64562202538632, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5681646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5681647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12430 + ... + 12878.

It is an arithmetic number, because the mean of its divisors is an integer number (277875).

Almost surely, 2^5681646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5681646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6669000).

5681646 is an abundant number, since it is smaller than the sum of its proper divisors (7656354).

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

5681646 is a wasteful number, since it uses less digits than its factorization.

5681646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513 (or 510 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 5681646 is about 2383.6203556775. The cubic root of 5681646 is about 178.4396613610.

The spelling of 5681646 in words is "five million, six hundred eighty-one thousand, six hundred forty-six".